After 7 years of grad school, I lived on about $20,000/year. This included me paying $1500/year in student fees. Tuition is free, but not fees. I also paid $1500/year on student health insurance. As a result, $17000/year was spent on the rest.
My stipend was only $15,000/year, so I averaged $5,000/year in student loans. I graduated with about $35,000 in student loans from grad school. If I found MMM sooner, maybe I had a shot at no loans, but I am pretty happy with the whole experience, including the loans.