Four hours driving is a long way to live from work when you have to drive back after a long flight, I live about 1.5hrs from home and that can be quite hard after a 10hr night flight.
Perhaps a local B&B after night flights would be safer.
I fell asleep once. I was on the freeway and crossed two lanes before I hit the gravel deviding strip, it sure woke me up! (I was very lucky to do no damage).
The longest journey to work that I've heard of is an FO who used to commute from LAX to SYD, 14hrs flying!!!