Here is a perspective from an old friend, who winged through a varied life that took him from fabulous wealth (own >100 sections of productive land) to bankruptcy, with plenty of intermediate stops going up, down, up, down the economic ladder. $5,000,000. You need $4,000,000, because if you got your eye on the ball you ought to be able to invest in real estate deals that produce 10% cash on cash, which is $400,000, and anybody ought to be able to live on $400,000 per year. The extra million is to cover the lawsuits when people discover you have the $4,000,000 and decide they want some of it.