No-one should be allowed to own more than 2 properties ever, and should not be allowed to own more than 1 for 24 months at a time. (So if you already own a property, and inherit another property, you have 2 years to sort out which one you want to keep and which one to sell. I think that's plenty of time.)
Maybe companies can own a few more at a time. You can have more than one warehouse if you're actually using all the fuckers. And they can own a few more properties at a time in case they're moving their offices and warehouses and that from one town to another. Basically, no having property you're not actually using.
LGBTQIA+ friendly community. Lots of retro games, bad movies. Keep it supportive, keep it kind.