Thanks for writing this. I am in the same position, working full-time in a semi-demanding job, with a wife, son, big lawn to mow, etc. I've been working nights and weekends for over a year and am 2 months away from launching.

My schedule looks almost exactly like yours. On Saturdays, I watch my son while my wife is at work, and I have the same mixed feelings about spending time with my son vs. working on my startup. Then I feel guilty for having mixed feelings...you know how it goes.

Good luck with your startup. Keep fighting the good fight!