What's the dollar amount you'd need in a lump sum to say you're set for life. Not in terms of no more income needed ever, but enough to say you would not have a 9-5 job. You could maintain your current lifestyle or a level you are comfortable with.
I'm just thinking about this question lately. I'm planning to build my business up to a level where I can sell it for this number. I have a mortgage, 2 kids in school, and all the extras of a middle class suburban family. Cars, camps, food, vacations, events, activities for the kids etc etc etc.
I know there are FIRE calculators out there, e.g.
When Can I Retire? Early Retirement Calculator / FIRE Calculator - Engaging Data
But I'm trying to figure out what I'd need to... pay my mortgage, have enough for 2 college funds, buy a rental income property.. maybe a beach or lake house... that kind of thing. Or maybe sell my house and move somewhere cheaper to live. So many decisions.
Anyway, my random number is 2 million. Plus a side business that's mostly passive pulling in 5-10k a month.