chips is the only way with roulette, just make the chips worth a certain amount and have players buy chips from you for ca$h and then trade them back in at the end of the night.

You might want to check out they have chips and stuff to make your home game the best in town. I think there is a book to help you with, how to set up roulette home game.
Good hunting.

well if you have chips and a table youve got it made,just use the payout structure at the website listed below and your on your way to makin money