Unintentionally in YC
medium.com
medium.com
Wish you guyz all the success
As someone who is married and the sole provider, this sounds (1) enviable and (2) completely undoable without a total life disruption.
Best of luck!
They didn't until they have secured funding and it worked out for them.
It's true that Paul and Eric didn't quit their jobs until YC, but at the rate we were going, they likely wouldn't have kept them for long given how much time they were spending on Bayes Impact.
My conclusion is just as it is: don't wait. Get started however you can. If you need to stay at your job, start now. If you can leave and devote your full attention, even better - start now.