As a point of reference, I built a 32TB Synology last year. I took me an afternoon to get it done, plus set up Plex media server, all the arrs and friends, a backup server and a couple other things. Since then maintenance has consisted of remembering to hit the “update containers” button once a month or so. I should probably automate that part but just haven’t bothered yet.

A lot of NAS are capable of hosting containerized services. The Synology DS series, for example, can run everything you’ve mentioned and so much more. For a relatively gentle into check out https://mariushosting.com/