So your Nuc is more than a Homeseer server?
My solution is to stop trying to use this particular box to run a few extra things.
Here thinking of purchasing a Nuc just to run Ubuntu Kodi IF it works well with HD / 4K.
It's a 34010WYK model from a few years ago. It's run HS3 quite nicely, along with being a printer spooler for the aforementioned printer. I don't keep any media on it but have also run pytivo or streambaby on it to serve movies to some Tivo units. No transcoding, just basically file-serving the media. As I've added a few more HS3 plug-ins I've noticed a bit of a slow-down, but that might have just been the UI. HS3 still ran all the events and such as expected.
Since we've got Tivo DVRs I've had no real reason to run Kodi/Emby. I've used Plex from time to time, but not all that often. The NUC has it's own monitor in a closet off the office. I only keep it there because there are some things that are easier from the local console. I've had no reason to display 4K media, and don't see it happening any time soon. If only because we genuinely don't care. At some point we're going to build-out the home theater and maybe then, but for now HD is fine.
The printer recently had it's USB port fail (danged plastic just broke in the socket). But it's running until I investigate replacing it. When that happens there will be even less reason to have the NUC off the office and I could probably move it to the rack downstairs. I'm debating getting a color laser, Xerox and Brother make some interesting choices. I'm not really a fan of HP's ink extortion schemes. We print literally no more than a few dozen pages a month but do use color. Anyway, any modern printer is going to have networking built-in so I won't need to spool to it from a PC anymore, further freeing up the NUC.
Tangentially, I have an nVidia Shield and, honestly, it's annoying. It's nowhere near stable and the remote is horrible. Much like various Chromecasts, Fire TV sticks and players, I don't really bother using it. Tivo continues to crank along just fine for us. I know some people rave about it but they must have pretty f'ing low expectations. I'm seriously underwhelmed by the Shield.