If you are sure that your son will get sponsored then dont miss it, many years ago I was offered full sponsorship by my airline and those of us who got the chance didn't miss it nor regretting it. Now we are flying and many are doing their degree through online, which I am going to start soon.
Getting fully sponsored for a pilot course is rare, extremely rare...its a life time opportunity so tell your son to get it asap. You can do a degree later also.