I left a full time (somewhat secure job) to go full time with my startup when I had an 8 month old at home and plans for a second child, which happened about 6

I left a full time (somewhat secure job) to go full time with my startup when I had an 8 month old at home and plans for a second child, which happened about 6 months later. Yes, it was a little scary but I had the full support of my wife. And I knew if it all failed, it would be relatively easy to get a job again, probably the same job I left. A couple of items that made it easier to do.. Living in Canada. I didn't have to worry about health care. Also, I knew my parents would help provide should things really go bad. So I think you have to weight the reward you will get from the risk, plus what you have to fallback on.