[codingdave]

It is possible, but you need to carve your own path. If you do the full startup grind, you won't have time. If you run your kids through the grind of various after school activities and classes, you won't have the time. But if you think carefully about what you really need, the project needs, and the kids need... you can still meet all the needs.

Set aside time for all of the above. When it is time to spend time with kids, really spend time with them instead of chauffeuring them around to have other people spend time with them. Do things with your family, and then sit down and focus on the project.

I'm not saying it will be easy. It will be harder on all fronts, and it probably is not the answer for most people. But it can be done.