alt Hacker News>I’d check that math - that’s 67k/yr, not 20k/yr. 1.2mill/18 years.
It is meaningless calculating cost by simple division when the endeavor takes 2 decades. Money today are different from money 20 years ago. S&P500 is pretty reasonable and well accepted device to calculate opportunity cost over such long timeframes.
I didn’t set these numbers, the other dude did then you backed it up even going so far as to lecture me about how 20k isn’t enough to raise a kid. I completely agree that this is meaningless, but I’m also not going to let 1.2mill suddenly equal 20k/yr raising a kid!