Relatedly: two of us have wives and families, which does make things more difficult financially and time-wise. Do any other founders have families? Do you work on the startup full-time? How do you fund yourselves?
I have a family also.. Y'all will think I'm totally nuts, but I'm a polyphasic sleeper ( http://en.wikipedia.org/wiki/Polyphasic_sleep ). Altogether I sleep about 2.5 hours a day, which means I can have a 15 hour work day (at night) and still have 6+ hours at just the right times to be with my family and do personal things etc. I have my wife's 100% support though, and that makes all the difference (I won the support by cleaning the kitchen at night, of course).
In some ways I miss the freedom of being a little younger and single- being able to drop absolutely everything and move somewhere, knowing you'll be able to take care of yourself at the very least no matter what. On the other hand, there's a certain stability in your life that comes from being married and from having children. It can really be an anchor when times are difficult. It also usually forces you to take a lot more realistic view of your potential startup. Will this really produce revenue? Am I really covering my bases? etc.
It's a strain on personal/family life, but I firmly believe that starting a startup now is the best time for me to do so. I've been in the work world long enough to realize what I don't like, what I'm sick of, and what kinds of things people in my position are looking for.
There's also something to be said for the support that a spouse can give you, and for the energy that children impart just by being around you. Yeah, I have my bad days, but all in all, I think that this is the time.
Focus is the main thing that limited resources will impart to you. My two most limited resources at the moment are time and money. Since I don't have much of each, and can't afford to fail, I am that much more focused on what I need to be doing.
I don't know how it'll work out, but my wife and I are considering the idea of "wife's full time job as funding", in the sense that if she has a good job, and we can get by on her salary, then I'm free to work on some things of my own.
In some ways, I think it's nice to be married as it gives me a certain stability that I didn't have before.
Edit: BTW, I'm 31. I actually feel like it's the right time for me to try something of my own. I feel like I have a better vision of more things than I did when I was younger. I don't feel 'old' though, and we don't have kids (yet).
Relatedly: two of us have wives and families, which does make things more difficult financially and time-wise. Do any other founders have families? Do you work on the startup full-time? How do you fund yourselves?