My two cents : Id make sure anything you got was based on Bluetooth audio and had a microphone. Then what ever you link them together with software wise doesn’t matter. You could put them together and run HomeAssistant or Openvoiceos for interaction or just have a media player running somewhere that feeds each room.
Interesting - I will have a look at disroot.org. Im not immediately understanding them but thats probably because where I encounter it I try to read whats available in Spanish to start.
Is that https://keepass.info/ ?
I want to be independent. My understanding is that Tail scale relies on a service they run or a endpoint you run on a VPS - Is that right?