State University of New York (of which I'm a graduate) estimates the yearly expense of a commuter student to be $17,320 @ a 4-year school, less if you live at home, buy used books, take the bus, or go to a community college. It's really affordable!
And there are so many opportunities for part time work on college campuses. Everything from grunt work to being a TA to being compensated for working for a department. Hell, I worked in the nursing department as a comp sci student sorting files and research articles for professors.
Along with this, programs like CLEP and DSST exams that let you test out of gen-ed coursework for $180 a pop. The savings can be in the thousands!
So for those students who aren't going to an IVY on a full or partial ride, or those going to med school, I say do some research before committing to a private school. There is absolutely no reason in my mind why somebody ought to take on such massive debt and I am totally against the idea of our government being in the student loan business.