Art School: $19,848.00 Debt

So I am going to the School of the Art Institute of Chicago. It's a world class program and I'm really excited about it, but I'm worried that (being an artist and all) I'm not going to make that much money when I graduate and the $276.00 monthly payment on that debt will be too difficult to pay off. Thus I am hoping to get on an income-based repayment method. Any suggestions of what I do? I also already have roughly $5400.00 in undergrad debt.