Fine. He should get a sleep study done, so a specialist doctor can describe the damage he is doing to himself, scare him a little, and come up with a treatment plan from there. If you only sleep for 4 or 5 hours a night, you are killing yourself.

Everybody who does odd-hours work should have a sleep specialist doctor, and this guy is one of the few who need one, that can actually afford one. Sleep is important. It is not wasted time; it is biologically necessary.