I just keep trying to think of how you can have $200k in student loans and not either a)be a doctor, which paying them back would not be a long term concern. or b) have a BS/MS from some pretty reputable schools, and once again have a pretty solid career making pay back reasonable.
The only thing I can think of would possibly be a veterinarian of some sort. I was talking to a guy at the SOS once and his daughter was getting ready to graduate or go to the MSU vet school and she was looking at like $160k in loans. Unless you have your own office or some other circumstance starting wages for vets are in the upper 60's(IIRC).