Questions about buy dont betting vigs

Maybe I should just call The Horseshoe, but perhaps its not all that simple.

In Tunica, the most liberal craps gaming capital off the world, hands down, they don't charge the vig up front for buy bets, they only change if and when you win. Not only that, you can remove them at any time, also without having to pay the vig. Not only that, the same rules apply to buy don't bets.

Lets assume the house is charging $1 per (up to) $25 for vigs.

OK here are some questions...

(1) On $5, $10 amd $25 minimum tables, what is the minumum buy don't bet for each odds pair (6-8, 5-9, 4-10)?

For example, on the 6 and 8, if I make a $30 bet, it will pay $25, but the vig would be $2, total payout = $23
For the 5 and 9, if I make a $30 bet, it will pay $20 with the same $2 vig, total payout $18
For the 4 and 10, if I make a $30 bet, it pays $15. minus the $2 vig, total payout $13

But if I try to make bets within the $1 to $25 range (to keep the vig at $1 rather than $2), the payouts for such bets may be less than $10, which might not be allowed on a $10 minimum table. I know that casinos vary the rules for the minimum free-odds lay, for example, on a $10 minimum bet table, once I get a $10 flat established on a dont or DC 5 or 9 point, some casinos allow you to lay $3 to make $2, some force you to make the lay bet at least the table minimum ($10), and some force you to lay an amount such that the payout must be at least the table minimum, forcing this bet to be at least $15.

Do casinos employ a simlar set of rules to the minimum amounts used in buy-dont bets?

(2) To determine a set of payout ratios for the buy dont bets using interger arithmatic (you know, the house gets to keep all the change), I came up with the following FACTORS:

For the 6 and 8, a $30 bet will pay $25 - $2 Vig. Another way to look at it, a $24 bet pays $20, minus a $1 vig, so the total payout is $19 for the $24 bet.

Similarly, for the 5 and 9, a $24 bet pays $16, minus a $1 vig, so the total payout is $15 for the $24 bet.

For the 4 and 10, a $24 bet pays $12 minus the $1 vig, so the total payout is $11 for the $24 bet.

For the 3 and 11, a $24 bet pays $8 minus the $1 vig, so the total payout is $7 for the $24 bet.

Finally, for the 2 and 12, a $24 bet pays $4 minus the $1 vig, so the total payout is $3 for the $24 bet.

BOTTOM LINE for integer arithmatic payouts:

6, 8: 19/24
5. 9: 15/24
4,10: 11/24
3,11: 7/24
2, 12: 3/24

Correct?

(3) Now that I have established these payout ratios (I think they're correct, suppose they are and that I employ them), what are the minimum bets on various minimum tables?

(4) Same question, but for someone who doesnt want to throw his money in the gargbage by making bets that can loose, and can't win, like making a $5 bet on a buy don't 4 on a $5 minimum table.

(5) True of False: on a $25 minumum table, these ratios force players to make bets with unreasonable paybacks, until they start making them much bigger.

THANKS!!

marty