Penworth.
I was able to do the job lot part-time, Atpls,CPL/IR. I used all of my holiday entitlement plus a few extra days here and there. The CPL/IR from start to finish took a year! But i was earning a full salary while training. I was fortunate with some negotiation i was able to start my engineering job at 5am, finish a couple of hours early and train in the late afternoons and evenings, having planned routes etc. the night before. Knackering but possible!
I am well aware of the frustrations of trying to decide whether to leave your job and just go for it. But there IS always a solution to a problem, you just have to find it!
Good Luck