Veltz:
1) Your argument is strongest for communities like Lakewood and Monsey. This would not be the case in almost any other city.
2) Property taxes are not the only source of school funding, local municipalities pay a potion of school costs, while the rest is paid by the state and fed.
3) Even Lakewood has nothing close to 7 k-12 children average per home.
4) If everyone paid tuition (either privately or through vouchers) tuition would not need to be 10k per child. Th main reason tuition is so high is because most people don’t pay.
In sum, although vouchers may cause an increase in property taxes, the increase would be very small in proportion to the amount of tuition saved.