My airline has for the past number of years had 1-2 classes of cadets undertaking integrated training in Jerez. Thousands applied for the 20 or so places that were up for grabs each year and applicants were from across the EU. We also recruit direct entry pilots and a very small number of "frozen atpl" zero experience pilots. Since March all cadets that were in Jerez have had their training contracts terminated. We have stopped recruiting along with just about every airline across the globe. The small number of contract copilots (employed by a 3rd party) had their contracts terminated. We are currently on 50% of pay and many are out of currency due to the limited flying available. Many are under extreme financial hardship. We have been flying 5% of our planned schedule for the past few months although this is now slowly increasing towards 30%. On the next roster we are hoping to see the schedule improve further to approximately 50% but this is still unclear. It should be evident that we are significantly over crewed and will be for the forecast 2-3 years. At this stage our union is in negotiations with our employer and it is unclear if a "BA esq land grab" will take place but time will tell. As we are a unionised airline there are agreements and precedents in place for the rehire of those pilots that have had contracts terminated when and if the market improves. Many of the larger unionised airlines have these and so there will be a long queue.
It would be pure madness to be even entertaining the idea of entering this industry at this time.
I would strongly suggest you undertake some detailed research into the industry as a whole. Start with reading through the various threads in the T&E section of this forum. The largest employer of cadets from the likes of CAE is most likely a certain low cost carrier. There is much detailed information on their current contracts and work practices. I will leave it to yourself to form your own opinion as to whether embarking on a career with these types of bottom feeder employers is something that you would wish on your child.
Advise your son to undertake a PPL if he really wishes to and then find a suitable career/trade so that if he wishes to undertake flying training if and when the market improves that he has a contingency plan to fall back on.