Advice on portable offline jellyfin server

[TheDreadPirate]

What would the networking situation be like at this location? Would you at least have a network connection for your devices to use to connect to each other?

I don't know about Roku, but Android TV devices don't need an Internet connection after the initial setup. You'd then install the Jellyfin app and connect to the LAN IP of the Jellyfin server.

In terms of hardware, the Beelink N100 is super capable, small, and power efficient and should more than meet your needs.

If you don't have ANY network connectivity provided by the place you are staying at, you could just bring your own router if that is allowed.