I have RZ 67, Bronica SQ-AI, AND 3 BIG Fuji 6x9 rangefinders. I would start with the SQ A, the lenses are fabulous and cheap. Tell him to start saving for a nice Fuji 6x9 next. No minilabs print 6x9 negatives, so the 6x6 is a great place to start with modern film and a tripod you can make 11x14s from a 6x6 negative. Medium format is magic, high quality without the hassle of view cameras. Tell him to watch Craigslist for enlargers, people will practicality give them away. I would get a 4x5 enlarger, then you are covered.
Mike
Bronica cameras are a steal, Hasselblad cameras are beautiful, elegant cameras, the lenses are several times more expensive than the Bronica lenses. Both are fabulous cameras If you look you should be able to get a nice SQ A outfit with the neat grip, in nice condition for around 500 easy