T Father,
All good advice and food for thought from the previous reply's.
Have you or your son given any thought to the US route? I took that route back in 1971 and I was able to achieve my goals in both fix wing and helicopters over a 50 year career. Take a look at Embry Riddle Aeronautical University, just another option for both of you. Just to sound like a broken record: Get a medical first!!! Also bear in mind that some medical problems can be overcome with both waivers and acceptable medications so don't total throw away your dreams.
The very very best of luck to your son.