Back to the original topic, assuming that w/o special ed the cost per kid is slightly above the national average. A yeshiva would still cost less, fewer subjects= fewer salaries, and yeshiva secular studies teacher doesnt get health insurance and earn less b/c they usually don’t have the same (or any) education where as a PS teacher usually has a masters degree.
OP said his kids yeshiva wants $1000 a month per kid (10 month school yr so $10000) I can’t see how it costs the school 10k per kid.
Thus my conclusion that charging 10k a yr is an attempt to cover for those who can’t pay full.