isa
As usual, I'm late to the "figuring out how loans work" party.

So. A question:
I'm trying to get an idea of loan rates from private lenders. Can I just call and ask what the rates are? Or does it vary so much that I have to apply? And if I have to apply, can I apply even if my school hasn't released the official budget? I thought I had to wait until I had that information before I could apply.
thanks for your help

I think if you just call up you'll get a pretty standard "our rates generally vary from Prime-2% to Prime+5% depending on your personal credit rating." (NB - I just made those interest rates up, I don't know if that's actually what any bank is charging) In order for the lender to tell you precisely what interest rate they'll charge *you* you'll have to start the application process and let them run your credit report/score.
I'm not 100% sure on this, but I think you can start the application now and get pre-approved, find out interest rate, etc. then finalize and actually sign the note once the school's official budget is released.
I think solaris1 mentioned this somewhere, but it's worth repeating: keep in mind that every time you apply for a loan or a lender runs your credit report, that inquiry shows up on your credit report. If you have a lot of inquiries in a short period of time, it can have a negative impact on your credit score.