Here’s an idea.
What if Roon 2.0 uses the cloud to give you synchronisation of the Roon database between multiple copies of Roon Server, AND they are providing a cut-down server that runs on mobile devices? That would keep your second home up to date and allow you to use Roon from a phone when away. Any local files not present on each server would be filtered out, so you could download some of your files to your phone, as space permits.
A bit like Dropbox but just for the Roon database.