re: Any of you married men with families ever quit your job without having another lined up?

Yep
Took a very, very nice voluntary severance package at the age of 52 and did not have a job in hand.
Three things played into that.

1. I had faith that God would guide my path forward.
2. I had full support of my spouse that I would find work sooner than later, and I did.
3. I was 100% burned out with my current job/employer.

Leaving after 30 years saved my sanity and ended up being a huge windfall on the $$ side.

Thank you "spouse" and God for supporting my decision.