As an aside, why not put the audio files on the NAS as well?
Anyway, this is one possible setup, using your NUC as the MC Server:
- Import your Video files into the NUC library, so it will hold all your media in one library. You can setup auto-import for the NAS folders as well as the local Audio folders
- Add your Kitchen Pie as a DLNA target to your server. You might want to setup different Zones with different output devices so that you can operate them separately and/or simultaneously. Make sure you can play something to it.
- Enable Media Network in MC settings; make sure to set an Username and Password for non-guest access
- The NUC is now your server; it should be on 24/7. Other MC's can now be connected to it and play music/video from it, or tell it to play to the kitchen or other DLNA/speaker zones.
- On the living room MC, just go to File->Library->Connect to Remote Library, and enter either the Hostname, IP address or Access Key of the server. It will ask you for username and password on connection.
- You should then see all your files on that MC as well, as well as the output Zones defined in the Server. You should be able to play to your local TV/speakers, as well as to the kitchen or other Server-defined zones from the Living Room PI.
If you prefer to have the living room PI as the Server, just switch the roles around.
Also, make sure you have the Server library backups enabled - best is to have it backup to your NAS, so that if the local C: drive dies you have a backup on the NAS.