I'm not sure this makes much sense. If you work for a large corporation you can easily make 100K+ a year and work a very reasonable 40 hours or less a week and

I'm not sure this makes much sense. If you work for a large corporation you can easily make 100K+ a year and work a very reasonable 40 hours or less a week and live off of 4K a month. Unless you're actually realizing those gains and earning 300K a month, you are not "basically making 300K a month for 4K cost". You are making 0 dollars a month for 4K cost. Further, if you think that it will pay you back in full in the future (instead of making the money right away), you will have to invent a wildly successful product and/or customer base to backfill the pay for all the previous hours worked. Realistically, you'll probably make nothing for your first year unless you start with a plan to secure funding. You'll also bust your ass for a year while losing money in the hopes of a reward in the future. I know they say time is money, but it's not money the way you seem to be equating it here haha.