I've spoken with several people who are starting similar companies and who've reached out to me (happy to do that!) - my advice is similar to yours: keep it simple, keep it focused. KubeSail is a developer tool turned home-hosting tool, but if I could rebuild it, I'd make it incredibly simple to get Jellyfin and a torrent/VPN client installed and that's about it, and then execute insanely hard on making that as streamlined and foolproof as humanly possible.