How much is your income that you would be considered a qualified co-signer for a loan? This makes no sense. If you have that much money, use it to pay your college costs not buy a house for your parents.
Like a poster above, I’m having trouble with this scenario. You are concerned about financial aid, but you think being a a co-owner of a house is a good idea? Especially with people who can’t get the mortgage all by themselves.
Just say no. And please, take a personal finance course.