Yes. It depends of course on where you are living and how expensive it is, but it is possible.
Hubby is a MSIV and I am a stay-at-home mom and student and we have always lived just on the stafford loans. This year, we did borrow a few hundred from a relative because of the price of COMLEX and interviewing, but hubby wouldn't have needed to if he was single.
Of course, we live in Missouri right now and cost-of-living is cheap. We are from Seattle and it would have been impossible to live off loans there.
Good luck!
Wifty