Current PT here! I did this as well and max out my grad plus loans. The loans don't kick in until 6 months after you graduate PT school...so that's sort of a plus. Try to find side jobs during grad school and work during your time off to save as much as you can. There's only so much you can do when you're focused on your studies though. I worked as a photographer on weekends so I got some "living" money here and there while I was in school.
When your loans start kicking in, the 7% is scary with fed loans, but not as bad as it seems I guess... I paid off 10k of loans on my first year of working and I thought it was so good... made no effect on my principle. 2 months later my interest went up to 2k. I graduated with 125k principle in loans.
Look for scholarships...but most of the time you won't find much after getting into PT school unless you win awards or some type of recognition.
Talk to your financial aid office and they can help you out. My advice is to take government loans, not private, because at least you can hold them if you're unemployed or something happens where you are unable to pay them back at that time. You can also go on income based repayment which lowers the monthly payment.
Be prepared to fight a beast!