The answer is probably - it depends on what metadata needs updating. However, you could simply disconnect from internet for a while. Roon will continue running until it wants to phone home. Danny has said that is some weeks
As long as the Core machine is authorized when the connection is lost, you’ll have some time to use Roon offline without having to re-authenticate. Your local library can be used here, but no TIDAL or Qobuz, and you won’t be able to use anything that relies on our services like Roon Radio, Artist/Composer Play, Album Identification, etc. As a temporary option, this could work while you move.
Yes, Roon updates metadata periodically. In these updates, sometimes image files are updated as well, which take up some space. When the metadata updates occur, it is hard to say how many images from your library will be updated, so if you are worried about going over a specific bandwitdth limit, I would run Roon in offline mode and perform the metadata syncs over WiFi.
@Mike_O_Neill / @Frank_Ventura - If Roon does not have an active network connection, it runs in “offline” mode by itself. Offline mode means that you won’t get any metadata updates/streaming services and after a couple of weeks you will need to re-authenticate your login (to make sure you have a license).
You should be able to communicate with the audio devices on your local network, but the above limitations of metadata/streaming will apply.