I have been installing sonos for large houses - replacing B&O equipment or utilising amps and speakers etc and giving them the ease-of-use which they use regularly. I have about 5 sites with 8x rooms minimum.
Normally I just ensure all units have ethernet connected straight to a switch, with mikrotik firewall control for their airBNB rents in a property elsewhere on their estate - so guests can’t see the controller and start playing ….
Been OK for ages - I had the ability to reboot, switch on/off wifi, change root bridge & update firmware.
Had a recent firmware update which decided to use wifi instead of ethernet - Now I have a root bridge on wifi about 400m from the main house and this is causing serious failures, even when it’s cabled.
Can’t do a thing to help them. Everything I mentioned above blocked. Need to make a 500 mile round trip because I can’t fix this from here - haven’t risked VPN as setting that up remotely could accidently cut them off which I cannot afford to do. Will there be any solution for people like myself who have actively promoted sonos with 5k+ spends to you - mainly soundbar and amplifiers - not your cheapest kit, that can remotely administer your stuff?
If not, I simply will not be able to recommend you due to the massive overheads caused by site only admin for simple, nonsensical physical management.