^^^this!

Since he is out of college and I believe this retirement wave to be real I say do it as fast as possible. Maybe it can be done cheaper than All ATPs and just as fast? That is a good option for his timeframe in life and they GUARANTEE you a CFI job at then end (I'm sure getting a CFI job anywhere these days isn't hard but you will get that 1500 fast as a MEI at all ATP). If he was 18 with no school my advise would be MUUUUCH different.