[JoelPM]

I used to believe that you could pick any two of the following three items:

1) A job you like and are good at 2) A body you like and take care of 3) A marriage & family you invest in and enjoy

I've found that you can have all three, but it requires a lot of flexibility, discipline, and willingness to say no to everything else (which is really just a manifestation of being disciplined).

I don't think marriage and a start-up are always mutually exclusive. In some cases they are, either due to the spouse or the start-up (or yourself, possibly), but if you're willing to be disciplined and set boundaries it's definitely possible.