I'm not sure that's quite feasible. 2-2.5M in 10 years is about the best I've seen excluding getting reasonably lucky with major stock jumps. You could juice that a bit further with really aggressive savings, but for most people, you're looking at 4-5M in income pre tax over that 10-12 year period (maybe a bit higher), weighted mostly toward the end, so without a ton of time for market gains to help.