I agree with everything here. I mostly was tackling this from the OP's question about if their family member was inherently bad for owning real estate, and I think my answer would slide to the no side.
If these properties are largely going to fund a retirement and are providing under market prices for rent I don't see what's wrong. (Although I have no problem taking that away and beefing up public retirement funding in lieu)
For anyone who has a Subaru and wants to get rid of this there is an aftermarket part you can install to bypass the telematics radio without losing access to any other features (if you just unplug it I think speakers stop working)
https://www.autoharnesshouse.com/69018.html
It's $80 for the one that retains the OEM head unit, but I'm thinking that might be worth it.