Student Loan Repayment Extensions?

I'm interested in attending Full Sail University in the fall. Film school is really pricey, so I'm going to need a $100,000 loan. The repayment period is 15 years which makes monthly payments around $800 after graduation. This seems a little unreasonable for a student fresh out of school to pay. Does anyone know if there are extensions for monthly payments like 24 or 30 years??