Credit Union is your best bet for Ireland. You'll still need a downpayment to cover it though.
I was in your shoes a few years ago. Had been accepted to one of the best flight schools in Europe, but didn't have a hundred grand lying around. Since then I've gone modular, worked full time and have obtained my PPL, passed my ATPLs and will go do my CPL/ME/IR in the coming months. It's cost me almost €30k so far but I've no debt since I've worked and paid as I went.
Go get a good job, pay your own way and take your time. It's not a quick solution but it'll work.