1. Understand the Pass Line Bet and its variations. The Pass Line Bet is the most common bet in craps. It’s a very easy bet and you can easily get through a whole night of gambling only knowing this one bet. All you have to do is put your chips on the pass line on the table.
2. For instance, by placing a $1 bet on Craps and Eleven, you place a 50-cent one on each of those. If the Any Craps bet ends up winning while the other one is losing, you win $3.50 and lose 50 cents, eventually bagging only $3. If the Eleven bet wins, the 50-cent wager will result in a $7.50 win and a 50-cent loss.
3. Whether you are a craps beginner, or a veteran of the felt just needing a reminder, here are the basic do’s and don’t rules of etiquette when playing craps in a casino: Don’t buy-in during the middle of a roll When you first approach the table, cash in hand, don’t buy-in during the middle of a roll.
4. In short, you are betting $1 less to win $1 less (which is a great deal for a bet that pays more than 1:1). Buy for $28, $24, or $20 depending on where they make the cutoff. I get the house edge of a $28 buy bet on the 5 or 9 at 1.42% ($29 buy on 4/10 to pay $57 is 1.0%).

When you make a craps Buy Bet on these numbers you get true odds which gives you 2:1 for 4 and 10, 3:2 for 5 and 9 and 6:5 for 6 and 8. The Commission For Craps Buy Bets. The commission for a craps Buy Bet is often called a Vigorish in land-based casinos. The Vigorish is usually 5% but it can still have a different impact depending on how you bet.

I'm pretty sure the Wiz's page is based on the theory that you can only go to $20 for $1 vig, not $25. If you're paying $1 on $25, that's only a 4% commission so that changes the overall percentage edge. Rounding rules are not uniform; I've made $39 buy 4 bets for $1 before. Try asking around how high you can go on the buy 4 for $1. Sometimes it'll be $25, sometimes $29, sometimes $35, etc. If you can make a $29 buy on the 4 for $1, that's only a 3.4% commission.
The Aria dealer is mistaken: you'd never have to pay again on the win after pre-paying commission unless you kept the bet up, which isn't paying on the win, it's paying in advance for the next bet. If you did that and then took the bet down before resolution, they *should* give the commission back. They don't always catch that, but in practice it's rare for someone to take down a buy or lay bet anyway.
But you have to pay attention: I used to do a hedge spread with 3 green chips: $50 no-4 (or no-10) plus $12 each 6/8. They'd charge $1 commission on the $50 no-4 and then I'd press the place bets $6 each whenever either hit; after 3 hits I'd take down the lay and just keep the place bets up. That's when I'd have to remind the dealer to refund the lay commission.
Otherwise, the convenient thing about that spread (for what it's worth) is that it's a complete wash when the 7 shows. $50 pays $25, $24 goes to remake the place bets and the $1 pays for the lay again. You're basically paying the lay commission to transfer the risk from 7 to 4.

One other thing that I was still uncertain about is if the vig is charged up front, would it would be advantageous when the number hit more than once. I concluded that the odds of hitting the number more than once would not favor having to pay the vig up front, however you are implying that the vig would have to be paid again each time the number is hit. This is clearly a disadvantage.

Oh absolutely, it's one vig per bet resolution, not once up-front for as long as the bet doesn't lose. That's what the dealer meant to say. Plus, that'd be an absolute mess once you started pressing buy bets.Loose 'Vegas rules' on the buy usually go up to $29 on at least the 4 and 10 (I have never looked into the 5 and 9 closely). I would imagine most Vegas casinos follow suit with the 5 and 9, but Aria's move saddens me deeply, these casinos will only offer what they have to not to piss off their customers.
To OP: $25 buy on the 5 or 9 is stupid. I hate to be so blunt, but you're getting screwed if you don't buy for an even number (same with buying the 6,8 outside of a multiple of 5). $25 pays $37.5, rounded DOWN to $37, $1 vig pays $36 total; $24 pays $36, no rounding, $1 vig pays $35 total. In short, you are betting $1 less to win $1 less (which is a great deal for a bet that pays more than 1:1). Buy for $28, $24, or $20 depending on where they make the cutoff. I get the house edge of a $28 buy bet on the 5 or 9 at 1.42% ($29 buy on 4/10 to pay $57 is 1.0%). This is an acceptable range if you're not going to be an anal retentive pass + come only player (I can't stand that strategy).
Buying the 5 or 9 for an uneven number is just as silly as taking odds on a point of 5 or 9 for an uneven number (I figured using 'odds' in both of its forms in the same sentence would have been confusing).

Craps Rules Buy Betting

Just buy the 5/9 for $30, pay $6 on the win and get $50. Such a deal!.
In Biloxi it seems few casinos have the same rules. MGM pays $36 for a $25 5 as does Hard Rock. Harrah's pays $35 for a bought $24 5 or a placed $25 5. No you cannot buy a 5 at $25! Treasure Bay same rules as Harrah's.

I used to do a hedge spread with 3 green chips: $50 no-4 (or no-10) plus $12 each 6/8. They'd charge $1 commission on the $50 no-4 and then I'd press the place bets $6 each whenever either hit; after 3 hits I'd take down the lay and just keep the place bets up. That's when I'd have to remind the dealer to refund the lay commission.
Otherwise, the convenient thing about that spread (for what it's worth) is that it's a complete wash when the 7 shows. $50 pays $25, $24 goes to remake the place bets and the $1 pays for the lay again. You're basically paying the lay commission to transfer the risk from 7 to 4.

Just splitting hairs here, but this is NOT a hedge bet since each bet could win, or both could loose. My understanding of a hedge bet is bets that are at odds with one another with only one outcome or winner (don't come and come at the same time, hard 10 and lay 10, any craps and passline)
I play like this often and I am putting a lay up and taking it down frequently. I'm sure it is a huge pain for the dealer - but they get paid plenty from my loose tips. I tip a ridiculous amount so they don't get pissed.

I play like this often and I am putting a lay up and taking it down frequently. I'm sure it is a huge pain for the dealer - but they get paid plenty from my loose tips. I tip a ridiculous amount so they don't get pissed.

Realizing how much (quantifying) I tip after hearing so many whining dealers is the main reason I don't worry about HE% as much as I used to.

Craps Rules Buy Bets

Pie-chart the 'cost to play' including transportation and tips and so on. If you really want to compare it to a job, cost opportunity on your time is really the biggest cost to gambling.
The house edge is the smallest number in any analysis I have ever done on what is the cost to play the game. The casino does not get much from me; the dealers get more (they still complain sometimes); and you just can't ever get away from the guy who is selling you jet fuel or gasoline to fuel your gambling habits.
If you keep ALL of this in mind, you MUST realize that you are there to be entertained. And if you ARE there to gamble for a life-changing result (IE: a good one) full pressure and/or TRYING to get rid of your money with the lowest compound edge (press all the way on the four and ten at LEAST until you get to max bet) is the way to go.
I've told this to at least one player who later won (and later gave back) $40,000 at the Silverton. You don't get into the tens of thousands of dollars flat betting minimum bets.

To OP: $25 buy on the 5 or 9 is stupid. I hate to be so blunt, but you're getting screwed if you don't buy for an even number (same with buying the 6,8 outside of a multiple of 5). $25 pays $37.5, rounded DOWN to $37, $1 vig pays $36 total; $24 pays $36, no rounding, $1 vig pays $35 total. In short, you are betting $1 less to win $1 less (which is a great deal for a bet that pays more than 1:1). Buy for $28, $24, or $20 depending on where they make the cutoff. I get the house edge of a $28 buy bet on the 5 or 9 at 1.42% ($29 buy on 4/10 to pay $57 is 1.0%). This is an acceptable range if you're not going to be an anal retentive pass + come only player (I can't stand that strategy).
Buying the 5 or 9 for an uneven number is just as silly as taking odds on a point of 5 or 9 for an uneven number (I figured using 'odds' in both of its forms in the same sentence would have been confusing).

I am aware of the small loss in rounding, but I still thank you for taking the time to point it out and provide a good explanation.
My ideology on the $25 bet stems from recently switching to Place bets from Pass/Come bets with full 3-4-5x odds. Instead of betting $5 on the Pass Line or Come backed up with $20 odds on the 5 & 9 to win $5 + $30, I make a $25 Place bet on the 5 & 9 and win $35. I did the math and found the same $25 as a Buy on the 5 & 9 would win $36.
I bet $150 across all 6 numbers: $20 Buy on 4 & 10; $25 Place on 5 & 9; $30 Place on 6 & 8. I'm still working out whether to Buy the 4 & 10 for $18 and whether to Buy the 5 & 9 for either $24 or $26. If the casino will allow it, I could spread $144 with $18 & $24 Buys and get a $35 payout on all numbers. I can't remember now whether or not I have ever made an $18 Buy on 4 & 10 in a live game, but my experiences vary, even at the same casino. On my last visit to Excalibur, the dealer wouldn't let me Buy the 4 & 10 for less than $20. I did Buy the 5 & 9 for $24 (getting $2 back from my $150), but then the floor/boxman walked up and asked if the $1 vig was taken up front for the 5 & 9. My previous visit, I made a $25 Buy on 5 & 9 and was paid $36. I'm guessing that a Buy bet on 5 & 9 happens so infrequently that the boys may not always remember the house rule.