Breaking the bank occurs only if the house fails to cap the total amount payable on a winning bet in a way that bears some reasonable relationship to the total amount of money in play. In contrast, parimutuel betting by its very nature does impose such a cap, and hence the bank cannot be broken.
Providing ATM service on the premises is one of the best ways to do just that. Your customers can make an ATM withdrawal from their bank account or credit union using their ATM card or debit card. If the customer reaches their daily withdrawal limit, they can also use the machine to get a credit card cash advance.