It's subscription only for now. A one time payment to go and free will be added.

There's Noah way God would do something like that.

Port 443 through Traefik and a port for Plex.

I name devices after Greek Gods / Goddesses. My main server is called Olympus.

This will also help prevent screen burn on OLED screens.

I found the DietPi OS to be great for getting a media server going. Alternatively, just install a lightweight OS, install docker, then set up Sonarr / Radarr / Prowlar / Overseerr (or Jellyseerr) / a torrent client / Jellyfin using docker. Make sure you transfer the OS off the memory card though, they eventually corrupt if you run the OS off them. Not sure about a remote, Plex let's you use the android app to fling media to another Plex app on the same network, maybe Jellyfin has similar?

I think Matrix would be the closest.

Drunkenslug and NZBGeek seem to be the go to for Indexers. I use Sunny Usenet as a provider.