I don't think it's about money as much as lifestyle -- the OP misses this entirely by assuming that both entrepreneurs are single and without children.<p>Something interesting I observed at Startup Weekend here in Indy last fall:<p>When it came time to form teams, all the young'uns grouped with one another, and the four of us codgers with responsibilities worked together. The line wasn't drawn according to age: there was one 30+ guy in another group, but he was single; two of the four members of my group were still in our 20's, but we were the primary sources of income for families with children, and I think that led us to fit in better with our 40+ cofounders.<p>With a few exceptions, I'd find it uncomfortable -- if not unworkable -- cofounding with the bouncy 20-something who has no outside responsibilities. When team building means getting drunk together on a Wednesday night, work hours are noon-8pm, and the company culture is low on planning and high on "nothing to lose", a company is just not going to be a good fit for me.<p>I'm fine with economic sacrifice, and with working hard. Because I'm looking for a new startup to join, I've tooled down my living expenses such that I could do an extended period somewhere between the two guys in that article. Because I've always been a hard worker, I've made my work schedule part of my family's life: I work a normal 9-3:30 in the office (currently home office, but I'm flexible), then after school, my son brings his homework to my office and we do our work together for a couple of hours. I tend to get in another hour or two in the evenings after he goes to sleep. I never get drunk, let alone on a weeknight when I have to get a first grader up for school in the morning. I'll never end up in an incubator because I'm not changing my son's school, leaving his speech therapy program, leaving our dojo, and generally up-ending his whole world in exchange for a few months of help for my startup.<p>I often meet people at my stage in life (kids, responsibilities, etc.) who say they don't do start-ups because they perceive "bouncy without responsibilities" to be the expectation of all startups. Their loss. I have to look a little harder, but I find other "codgers" out there in the entrepreneur community. I have to wonder if the people held back by the stereotype really have whatever that spark is that makes us take risks on new things anyway.<p>Oh, and I almost forgot.... GET OFF MY LAWN!