Medachiever can tell you right over the phone if you qualify for a loan with them or not, usually just takes a few minutes for pre-approval.
Medachiever has a higher borrowing limit, allowing you to take out as much as you need to attend Saba. Saba and Medachiever recommend not applying much earlier than 3 months ahead of your start date. I applied a year in advance, so I had to cancel the loan and re-apply because they told me that was way to early back then.
I don't know about Teri, since I haven't done that.
Is the deposit now $750? I paid $500 for the seat deposit just a few months ago.