I live in the US (expensive east coast). Here, you get average of 1% yield on your bank which is considered high yield btw. So 1% per year before taxes is 100,000. Thats a min. pre-tax that I need.

Note that I did not mention anything about investing/markets etc. because those are not guaranteed.

My wife once told me that $20m was her "fuck you" number. Handbags man, expensive habit.