> The cost of living in Louisville is 7.6% below national average. The cost of living in NYC is 123.8% above national average. In other words, I’d need to earn over twice as much money to maintain the same quality of life in NYC.
This is false. You only need to make twice as much as you are spending. I don't think anyone making something like $100k in Louisville would be spending all their money and then would need to make $220k in New York.