500k$ after tax is what, 300k$? Subtract 40k$ living expenses which is very much on the low end, and you end up saving 260k$/year. Assuming 5.5% real world mark

500k$ after tax is what, 300k$? Subtract 40k$ living expenses which is very much on the low end, and you end up saving 260k$/year. Assuming 5.5% real world market returns, takes 12 years to get to 4M$.