I dunno the situation in the US, but think that one thing is the same everywhere: you'll be more satisfied being your own boss, and even in the beginning less money will come for more work, it's worth it. You choose the timing, working hours and ofcourse, the cost. I'm almost always available for couple of small companies here (mainly computer repairing and maintenance), and they really appreciate it. The job is more enjoyable, less stressful and if you do the job right (I'm sure you do), everybody is happy. You won't be a gazillionaire, but you'll be satisfied, more calm and you'll have the choice of choosing the free time to mess up with the watercooling
.
I'd say go for it.
my .02
