I see you didn’t put the costs in numeric order, and my quick reading of it missed a “lower” priced school at “only” $13.5k per year, per child. Even that is astronomical, especially for a family with six, seven, eight or more children. Which is exactly why you don’t find MO families with so much children, as you would in traditional Orthodox families.
It is well known that MO schools don’t negotiate lower tuition prices by much, even if the family cannot afford the MO schools lowest offer. Unlike Chareidi schools where many parents can be paying $4k/year per child, some even paying less than that and some parents even paying almost nothing.