This will clearly hurt the home values inside Washington school district (but as pointed out will increase those that neighbor it) as now people will not have to buy a house there if they want there kids to attend Whittmer. I am a few years from selling my house and I would love for my district to become closed enrollment force those people to come and buy a house and pay the taxes to educate their kids.
The numbers are anecdotal for a district that size. Those looking to cross boarders are not likely to have the resources to buy a new home, they're not in the market. Housing values will not be lowered in WLS and rents, probably not housing values will rise in PP and parts of the north and west ends. Of schools surviving because of vouchers, it will hit Central Catholic more than most.
I'd predict this would be used mostly by those out in the Point Place and north end who have their kids "live with Grandma" because she lives on the WLS side of a street or are sending them to Waite or one of many voucher schools, primarily Cherry St. Probably new enrollees more than those presently there. With the covid, Freshmen haven't really become emotionally part of their TPS schools so it might hit their sophomore classes.
It might hit onesy-twosy those that really wanted to avoid CCHS so badly, they're sending their kids far to Rossford, Northview, Stritch, even SJJ. But the only school with significant numbers affected with be Cherry St. You will also see them hit from the near Westside, Scott district as the commute from there to Whitmer is not bad at all.
TPS will get hit by its Vo-Tech program, which I'm not sure has shown itself effective or well led. The magnets might not get hit, the Aviation center probably won't get hit as it draws from outlying districts. But I think it will be an attraction if a kid/family is able to learn their skilled trades when they're all housed in one place, a place near jobs and they're not having to attend a foreign environment to get that training.
Thinking about the numbers, I think WLS could start this up by only vouchering Vo-Tech, from 7th to 12th. Unless they decide to actively compete with Penta, we're talking dozens into the whole WLS system more than we are hundred's of kids. TPS can absorb this. Cherry St will struggle to do so and have to dig deeper into TPS.