Depends how much 'bank of Mum and Dad' has to spare. If he can't get sponsored (or tagged as it seems to be called now), then you're looking at the prospect of a long period in the wilderness looking for work. I wouldn't believe ANY of the verbal diarrhoea spouted by these training organisations about your son's job prospects and how they have links to the airlines. They're a business and placing candidates in a job comes a very poor second.
As said before, I wouldn't encourage anyone to shell out that amount of cash unless they were sponsored (/ tagged), and even then, think carefully about whether he really wants to do this. Training is tough and long and a flight school has the ability to chop anyone. I've always said, getting sponsored is hard, staying sponsored is even harder. . . . was in my experience anyway....
Good luck.