hi
yes that is possible.
the best way to only have one bet at any time, is to use the balance and available funds condition, because when a bet is made the balance stays as it is and the available funds is the balance minus any bet liability.
the condition would be
and selections trigger expression balance is equal to total_funds
there are a few ways to have triggers bet 10% and 50% extra
you can use a formula in the amount box
or have 2 or 3 triggers to place the bets
first trigger to place a bet if wins is equal to 0
the other triggers to place a bet if wins is equal to 1(for the 50%)
another trigger
if wins is equal or greater than 2 (for the 10%+50%)
mcbee