Easy fix, give out a free pot of paint if they enter whatever. Then offer different levels of awards for winning depending on if they pay or not. 5 dollars bronze is a upgrade prize, 10 dollar silver is a extra level of prize, 15 dollar gold is top level prize potential. Give everyone another pot of paint at the end for playing thru. They get two pots of paint and if they want a chance for more, they can pay into it.
thats an excellent idea!!!!