Ain't that the truth.
I live in Orem, a city you probably have never heard of. Population of under 100k, not a rich city by any means. Median individual income of 26k, median household income of 65k.
There are no single family homes for sale under 400k, and all apartment/condos for sale are 300k.
Just picking a random apartment for sale for a little under 300k and doing an estimate of 10% down with current rates is a mortgage of 2.2 k a month on 30 year fixed. So of course whoever buys and rents these out are going to do so at AT LEAST that number.
With JUST taxes taken out of 65k bringing it down to 45k, the mortgage/rent alone would be well over half the median house hold income for these things. But of course there would be HOA, withdrawals for 401k, withdrawals for medical care, etc. Meaning it would probably be closer to 70% of median household net just to pay mortgage on the cheapest apartment for sale.
And of course we can repeat this exercise for just about any city and get the same result. It's scary.