After many years of software engineering, I switched to part-time in order to dabble in board game design on the side. It was fantastic - enough money to live comfortably, lots more free time - but also a little bit like golden handcuffs: in order to switch tech jobs, I'd have had to find another place OK with me working 3 days/week.
After doing that for 6-7 years, I talked it over with my wife and quit my tech job to do househusbanding instead. It got her more time (fewer chores) and me even more time (household work didn't take nearly the 30 hours/week that 3 days work + commute had), which let me ramp up the board game design. My wife works in tech, so one income was more than enough for us, even socking away plenty for retirement. It took some psychological adjustment on my part, but she was really good about vocally appreciating the work I did, which helped a lot with the transition. (Plus, I got to give a big middle finger to gender stereotypes, which was a source of satisfaction. :)
Then we decided to have kids, and I became a stay-at-home dad. Help from family and babysitters means I'm still able to spend some time pursuing game design (note: this is not cost-efficient - either "I parent full-time" or "daycare" would be cheaper - but it works for us, for now), and parenting is fantastic. Also frequently exhausting and frustrating - there's a heavy tradeoff of immediate-gratification happiness for life-arc happiness - but very rewarding, and the sound of my kids laughing together is pretty much the best thing in the world.
I still love programming, I just don't do it much. (Little side projects for fun every once in a while, or simple tools supporting my game design.) And I think I enjoy it more when I do, because I'm doing it intermittently of my own volition. Once both kids are in school and I have a little more time, I'll probably start messing around with mobile development - I find it slightly disconcerting to look at a computing device and not have the bone-deep certainty that if I chose to invest the time, I could make it do just about anything I dreamed up.
With financial reasons as your main barrier to quitting the industry, much of my experience won't apply to you - my wife's salary is the only reason things work as they currently do. But if you can fix your budget so that you can live (and save!) on 40-80% of your current income, you can try to find/make opportunities to switch to part-time work. I found that when I did, the benefits of the extra free time made me more focused during my working hours, and happiness with my life situation made me more excited about my job in general.