Im in my 50's and have walked out of 3 jobs without one to go to. And don't regret any of it.
My most recent was last year when I started a new job and for the first time ever in my working career was bullied. It was the CEO so I had no one to complain to.
Emptied my desk on the Friday and sent a curt email on the Monday telling them I wasn't coming back EVER.
Single parent of 2 kids, no savings. Got a job as a Care Assistant within the week (luckily already had an enhanced DBS with the update service).
I had 4 care assistant interviews lined up too. They are desperate for staff.
Didn't pay my mortgage that month, but the relief was tremendous, nothing is worth being that unhappy for.
I had to work about 50 hours a week just to survive but my god I loved it! I absolutely love being a care assistant, the difference you can make to people's lives is out this world.
Anyway did it for about 4 or 5 months and now have a new job as a very senior manager in the Civil Service. Which I love too.
Each time I've walked out of a job, I think how stupid and reckless I am, but it's all worked out.
If your husband is supportive, do it! Just do it!