Site-to-site and individual client setups are not mutually exclusive. They can co-exist.
I have Wireguard on both my phone and laptop - and tailscale should work the same way - which I only activate when I’m away from my home network.
You could even set it up where each “roaming” device is always connected to their “home” network by VPN, which uses site-to-site to further route the traffic where it needs to go.
I recommend looking into setting up site-to-site VPN configurations between routers at each location. I have this set up between my home network and my parents’ network.
Once you have it properly configured you can simply have the router itself handle routing of specific traffic over the VPN connection, instead of needing each device to connect to the VPN individually.
it’s a bit more complicated to set up and maintain but not anything outrageously complex, and absolutely worth it for your use case IMO
It’s mostly about consent. We can debate when and where sentience begins, but it begins somewhere and vegans hold a moral philosophy that says using another sentient being’s work product or body without their consent is immoral.
Note that I am not vegan myself but understand, if not agree with, their moral position.
And as another reply said, most vegans recognize it as a “best effort” philosophy, as they appreciate the impracticality of an absolutist stance. They are focused on “harm reduction”.