Thanks for all the responses everyone!
I like the Stages ones as well, but they’re at the premium end for the most part. After some looking, I settled on this one I got on AMZ, “EFITMENT Indoor Cycle Bike, Magnetic Cycling Trainer Exercise Bike w/ 44 lb Flywheel, Belt Drive and LCD Monitor with Pulse - IC033”
Heavy fly wheel
Integrated iPad holder
The last thing was the hardest to find on a budget bike. This one was ~$450. It’s perfectly quiet and between the belt drive and the mag resistance it will almost never need maintenance.
Two complaints that would be easily solved in a more expensive model: it’s “dumb”, so doesn’t connect to TR, Z, or Strava directly, and the head unit isn’t backlit. To the first point, I have some old wahoo sensors I might strap on. To the second point, I’m going to see if I can get a different head unit, which fingers crossed might be able to connect to a phone or iPad on its own.
Thanks again everyone.