$20k per year tuition is not really an expensive school just for rich people nowadays. Daycare easily costs that and there is no public option in the US.
The public schools in my area spend about $30k per student per year.
that's why the poster said
minimum $20,000. I don't have kids and I'm not really up on what such schools charge. Like everything, tuitions likely spiked in just the last few years. I wouldn't be surprised if some schools were even higher that $40K. That's yearly university levels at some really decent schools.