AppleTV is pretty random and only vaguely incidental to the solution. Tailscale runs on computers. Basically anything will do. If you don't have a home server, just grab a cheap RPi or an old laptop. Or in a pinch drop it onto an old phone from your old phone drawer.

I think most here know that. What interests me is how easy to setup and maintain an appleTV is - you do nothing.

I love my Pi but sometimes I want life to be mindless easy.