Don't forget the additional £25-£30k for a type rating.
Just a note, from a reputation perspective, FTE don't have the best reputation compared to other schools based in the UK (many of which have the benefit of a fair weather base overseas, but still with the connection associated with having a UK base). They used to have a much stronger reputation which has now sadly deteriorated.
Check out funded courses, such as BAA FPP, the Virgin MPL and other part-sponsored schemes.
Also, be sure that your son REALLY wants this, because passion and dedication to the training is what will get him through with minimum cost. If he isn't 100% committed, he will struggle. There are much better career choices than Commercial Flying.