I've never really understood the assessment of risk that people apply to starting a company. If my company fails when I start full time on it then I'll get a job in a week tops unless I decide to take some time off. My family won't ever notice the difference except when I have to get the insurance information changed with our doctors.
I have a wife who stays home with our daughter and another kid on the way. Maybe I'm delusional but it really doesn't seem very risky to me.