A friend of mine got a loan for €60,000 for flight training. He was unable to find a job for two years, so he worked at a fast food restaurant. During those two years, he moved up to a manager position within the restaurant. At the end of those two years, he finally got the phone call to work at a flight instructor. Now that he is working as an instructor during the week, it still doesn't cover the cost of his loan and living expenses, so he still works at the fast food place on the weekends, but he makes more on the weekend at his side job than at his flight instructor job during the week.
In my opinion, a loan of such a large size is outrageous if you don't have a sizable income already or a large savings, or if you don't have someone to help with the payments. I could see taking a small loan to help finish paying costs once you've saved up quite a bit, but the reality is that lots of guys finishing training today are not recouping the costs or making ends meet right out of training.