Have you talked it over yet? I know sometimes it's tough to get together one on one to really discuss feelings, esp. if the other is tough to pin down to talk.
This is important for you both to work out together. Perhaps you may both agree to work part time... or perhaps he needs to think more about it. A highly driven man can be hard to navigate this with. (my dad is a VERY driven man), Maybe bring it up in a relaxed setting, on a get away trip.
I'm sure others here have better input... good luck.