As a side note, the frum population in Monsey/Spring Valley has a lower percentage of special Ed kids than the general population does, I don’t recall the numbers off-hand.
My point is that all factors effecting the cost of special Ed should be considered, whether positively or negatively before throwing around numbers to the tune of “millions of dollars”. We are not such suckers…
Additionally, I don’t think the quality of the education for in house public school children with Down’s Syndrome is comparable to KJ UFSD, so we’re not exactly comparing apples to apples. KJ specializes while public schools are kind of the jack of all trades.