He's one of the richest people in the world, with a massive interest in space & rockets, and owns the most exciting piece of space technology being built today. Where else would you spend your time in this situation?
If your goal is to get rich and play golf and relax, that is one thing. The fact that Elon is one of the wealthiest people in the world and also as passionate as someone working in their garage seems kind of like a crazy situation.
I wonder if there is similar historical precedence in terms of an ultra wealthy person being interested and involved like he is.