Please don't do it. Not now. You're only 19 so go get a career and save some money. If/when the market picks up then train but not before. The chances of success in getting that dreamed of job are almost non-existant at the moment. Don't think "Oh well, I'll just go to Ryanair then" because Ryanair are bloody difficult to get in to. Of course you have to have the finances but Ryanair don't care where you get that from. All they want is the best and they can be, and are, very very choosy. To finance against a house (especially someone elses) would be criminally insane.
To answer part of the previous post, an FO will fly 600-700hrs p.a on average as there are variances between bases. The recruitment bubble will burst when all the ordered aircraft arrive in approx 3 years. After that it will be just patching gaps.
Put a response on this thread to let everyone know you've read and fully understand what's being said to you. You should openly and honestly share this with your prospective financier!
Don't forget that the Flying School, like any business, is your enemy. They want nothing more from you than your cash. They don't actually care about you at all......but they'll flatter you, make you feel good, even important, but all they want is your money. Once the money is spent and the exams are passed your life is of no interest to them. You are no longer a source of cash. You are unimportant. Please remember this. THEY ARE YOUR ENEMY !!!!!