Looking to build wired Android Box network w/o Internet access

Hi guys,

I'm looking to build a private network for a hostal with the following specs:

- up to 8 separate Android boxes which allow access to a restricted number of apps
- up to 10GB of shared media
- must be wired
- each device must be able to stream 1080p video

My primary concern is having a streaming app such as Kodi or Plex which does not require an internet connection for verification. I can do updates manually with a USB stick.

I also anticipate that all 8 devices will be streaming media at the same time requiring a lot of bandwidth. Also, there may be up to 7 cameras on the same switch.

Any suggestions for boxes and software will be greatly appreciated.