When is enough enough?
It sounds so definitive stopping your job. But is it definitive?.
When I look back to the 13 years of fi now, I see that I have in that period worked with pleasure on three free chosen projects which made money enough to supply my funds further. It costed me 4, 2 and 14 months so less than two years.
And in the other 11 years I was able, by doing all kind of things, from maintenance to installing solar-panels, to decrease my spending. But increased my skills, not to speak of my improvement on piano playing.
Since I took the plunge, the cost of living increased too, but all those years my spending decreased! Think a little about that...and perhaps plunge!
(the last 10 years of non fi life I worked as an entrepreneur so I was already used to fluctuations in income, that colored my views I think)