Allioth
Have you had a good look at the CTC scheme? I don't know if you understand the financial set up - if you are entering as a cadet with little experience you don't need to have X amount of thousands in the bank as the loan will be sorted for you. If you are dead set on getting the blue book and working for an airline, it is worth applying before you borrow lots of money.
I think the best course of action would be to make a decision on where/with whom to do your training and then sort out finance, rather than borrowing a ball park sum speculatively.
From reading your post I am thinking you have already borrowed cash and are now trying to decide on which training provider to go to. Is that the situation?