My mother recently decided to retire, but shortly after decided to start her own business instead.
Another option is to not get married or have children in the first place, and open yourself up to an entire lifespan of such opportunity.
More generally: Never listen to anyone who says your demographic can't start a startup. They're wrong.
Some men (I'll speak for myself here) associate marriage/family with risk. Others associate it with security. Could it be that those who perceive the risk are those who (more or less subconsciously) know that they have/will marry a variant of "trophy wife", beautiful but high maintenance, while those who perceive the security or comfort know they will/have chosen someone who will make things less bad for them if they go wrong?
What does it say about me that I only see risks and dangers in marriage/family ("I'll do it when I'm rich enough/have a comfortable cushion") while my friends are all getting married or starting families, money in the bank or not? Hmm...
Beautiful, intelligent, driven people of either sex are uncommon to say the least, and even if you find one, that doesn't mean you will be compatible; i.e. your goals may not align. For example, one of you may be driven to climb the corporate ladder, whilst the other may be driven to establish their own successful corporation in lieu of obtaining a regular job. If you're not successful quickly, you might be seen as lazy/unrealistic/non-contributing.
So, what are the odds of meeting someone who is beautiful, intelligent, driven, low-maintenance, and understanding of the implications of founding a startup?
Surely, you make it sound easier than it is.
P.S. if that sounds snippy at all, I don't intend it to be, I just meant that while you have found a treasure of a wife, everyone here is not going to be able to run right out and acquire one with ease.