If you want to get a job in USA i.e. FAA Flight training and going over there to work and live for your career then you'll need a degree over in Europe you don't.
You should aim to get yourself a basic, good job and then put money towards the flight training. Nothing wrong with borrowing money for the flight training but you just need to make sure you borrow what you can afford, for most people £50K+ is far too much.
University is good fun, but it's also expensive so if you want to go make sure you really want to go and do a course you're interested in because the real difficulty with Uni is the motivation not the course.