As a Captain with a very orange company, I have two boys who wanted to become pilots. I presented them with all the facts and figures compared T&C from five years ago until present, based future. Prospects on those changes.
They have both chosen other careers. I am afraid to say having been in aviation since leaving school some......years ago, I could not now recommend any one becoming a pilot.
If your son is determined then make sure he goes in with his eyes open.You will have to take a secured loan against an asset of between approx £ 100,000
Good luck.