I had a choice between a program in DeKalb, IL (cornfields) that is $25K and one in Chicago, IL for $55K. I went with NIU, because while I know that either program is cheap compared to some other programs, the 30K difference is huge to me. I mean, that's $30,000! That's a lot of money! And while I love Chicago and don't really care for DeKalb, it's PT school. Maybe being in DeKalb is actually a better thing because there will be fewer distractions there. And yes, consider interest. A 30K difference now will potentially become, like NATO pointed out, a 60K difference.
PT school is only 3 years long, but you'll likely be paying those loans back for much longer. If I were you, I would suck it up and go to the very good school that will give you an education for a very reasonable amount of money. I really think you'll be thanking yourself later.