If you're relatively successful, this isn't too far off from reality. If for example you make $75k after taxes, your living expenses is $25k, and you invest th

If you're relatively successful, this isn't too far off from reality. If for example you make $75k after taxes, your living expenses is $25k, and you invest the rest with a 8% return, you can retire after 10 years and have a safe withdraw rate of 3.5% (equaling 25k) in perpetuity.