There are cheap “travel routers” you can buy that can hook up to either a wired connection OR WIRELESS connection, and provide their own local network wirelessly (rebroadcasting a new wifi signal) or wired (via a second wire port). With this, you ought to be able to connect to the ceiling wifi device and create your own local network that won’t bother the complex’s internet.
One example of a device can be found on Amazon (Note, not a promotion of this particular device, nor is it a sponsored link):
I have this, and a nano (another type). They are decent. We don’t use them often, but if you want a tiny travel-sized device for a decent local network, it might do. I have NO idea how well it works speed-wise. Most likely, you’d set this item up, plug a switch into it, and hook up the server and computer to the switch and be able to view all your plex server items locally.
In fact, you can run your plex server without this device. Plex is capable of working offline, so all you’d need is a switch with your devices hooked up (or better, a router to handle IP addresses) and they can talk to eachother. There are guides on how to run Plex offline, but you do need to have internet at one point (right now, before you move in) to be able to change these settings, but once you do you can run and play from it with zero internet.
I’d suggest the travel router just so you have internet in general, but at minimum a switch could work. However, why not just run Kodi instead? Plex’s power comes from auto-transcoding of files on-the-fly, either for less capable devices that can’t run 4K or x265 video, or for remote viewing for people with slow upload speeds. Kodi can play ANYTHING, and runs on most anything.
