I'm married with 5 kids. We live in rural Wyoming (no income tax, bought a comfortable house for $86k). We've always lived well below our income so we have no debt and sufficient savings.
I mostly choose to work on "products". That helps me focus on problems that people actually care about without any of the startup pressures. Although, I've also written several open source libraries that I thought the community might like.
I started by telling my employer that I would only work 4 days each week. I spent Fridays working on a cool idea my brother and I had. That idea proved useful enough to pay the bills so I quit my job.
I'm much more relaxed now and spend better quality time with my kids. In hindsight, it would be worth almost any sacrifice to get to this point again.