I would suggest an alternative that is working very well for me. I have a loan from a local bank where my family has being doing business for quite a while. It's a secured loan with a floating interest of prime plus 2%. Only the interest is due every month (about $70 for $12,000 I still owe on $20,000 I borrowed 2 years ago). It will never mature like most student loans where you're hit with a big monthly bill 6 months after you finish and are making barely enough for Smack Ramen. The bank likes it because the longer you defer on the principle, the more they make and they risk nothing because it's collatoralized. The smaller banks can be flexible sometimes so it's worth a try. It gives you some leeway for the leaner times and you can always send them any extra money you have.
If possible arrange for it to be a "line of credit" as opposed to a simple loan so that you can continue to borrow against it if necessary down the road.