I wish you the best on this one, going to be difficult. Once you hit your 15 units won you'll have $3,300, then what will your wager progression be? You'll have 35 units (using your numbers) to win $16,700 - that's close to a nickel per. $500 x 35 + $17,500. I wish you the best, heck if you get half of your goal you've done a fantastic job.