So far, the best one I've been able to come up with is firefighting. It provides enough money to survive, and requires 10 days of work per month (and my firefighter friend tells me station life is often quiet enough that you can often work on other things while on duty).

It doesn't provide much opportunity for networking or solving interesting problems on the job, but the job security, reasonable pay, benefits, and low hours seem like a great deal.

Any other ideas?