I was once straight out of school and wanting to get into one of these flight schools. I am glad life took me down a different path, a path which still landed me in the right seat of a B737 by my late 20s.
Go through university (if you're in ireland the state will pay, via a means test), get a degree, do a work placement. You have a choice of aviation degree or something completely unrelated. You have all of your 20s to become a pilot. Trust me I know what it's like to have those ants in your pants.
If your parents can afford it then great. If it's that much of a struggle on them then it's best you didn't. Do you really want to risk your parents losing their house over your training? If you graduate in the middle of the next recession in 2 yrs, you won't be finding many jobs. Meanwhile the bank will be knocking on your parent's door demanding money. If they can't pay - that house is gone. Not to be Mr. Doom - but as an 18 yr old, I too spoke about my parents simply remortgaging their house and all was taken care of, not quite realising just what that meant in real terms. Bless my parents, they were willing to, it never happened though. On principle I am glad we never did it. Your parents risk losing their house to fund an overpriced course, to make some training director richer and richer? When you do eventually do your training, you will realise that these insane price tags are completely out of place and in no way justifiable.
There are plenty of schools all over Europe that allow you to complete the modules in stages ( 'modular') for far cheaper, and all lead to the exact same EASA license. Airlines do hire these people too, contrary to what the big shiny schools will tell you. This forum has a wealth of information, take days going through old threads and building your picture about the landscape. If you have any unanswered questions or want some advice - ask here.