don't wanna be overly combative either, and i didn't double-check the math, but that's an awful lot of constraints and assumptions built into that docket.

one i'll question immediately is 12% returns, which is quite high given historical means and a figure you'd expect a reversion to sooner rather than later. you'd also need to have a brokerage/retirement account of some sort and have enough financial literacy to know to invest in the s&p vs the thousands of other options available. you'd also have to be lucky enough not to hit a severe recession/depression too early or at another inopportune time in your life, like while having a serious medical condition.

with that said, yes, you can totally live off of $2000/mo and save $1000/mo (i've done it for a short time) if those stars do line up (like being young, having no kids, and finding $400/mo rent) for some number of months, but i'm not sure it's feasible longer term for most people most of the time. circumstances and people change.