I don’t even have a web interface on my server, so with that in mind: If they are managing it day to day, get a qnap device, my none tech friend has one, started with a 2bay now has a 4 bay with 8tb drives (QNAP TS-464). I’ve only ever had to help him with the old one, can’t remember what the problem was but 10mins and the command line and it was fixed.

Also have a look at true as or hexos, I think they have immich as an app, not 100% sure