I wonder how much money you need.
Seriously I've been thinking about this. I've got a baseline figure in my head but it's probably inaccurate and concocted according to what I earn. When I actually think about what i absolutely have to spend money on ie rent (am a social housing tenant), council tax, bills, food, the real figure is probably less.
At age 50 I've already got nice things in my home, white goods, furniture etc, a car. I've got savings, a bit of pension, I'm set up how I want to be in practical terms.
I do some work "on the side" but it's very much on the side because between full time work and family there isn't space for much else. But this on the side work, the hourly rate is pretty high, I enjoy it, I get excellent feedback about it, it's something I could potentially keep doing for another 20 years, although maybe not at full tilt.
I'm seriously thinking about putting my energies into it. It would certainly give me freedom.
Do you have anything similar? Or, could you go part time? Honestly, what do you actually need to live on? Would part time cover it?