That's what I do. I bought a thin client last year, because Raspberry Pi 4s were unavailable to me. So I (fortunately) bought a thin client and got into Proxmox. I have the following containers running on the machine (that i can think of right now):

• Nextcloud (files, notes, contacts, calendars)
• Jellyfin (media streaming)
• Pi hole
• docker host (with home assistant, traefik as reverse proxy for everything, anything else i want lol)
• gitlab instance and kubernetes cluster (implemented in three containers, which is just for learning purposes)

Edit: some of the thing i want to do in the future:

• paperless-ngx (server that a scanner can send files to so your pc doesn't have to be powered on i believe)
• actual budget (budgeting)
• mediawiki / kiwix (hosting wikipedia dumps)
• some other dashboard than heimdall for links to all my services
• a vpn i can log into from outside of my home network (used to have pivpn on my spare raspberry pi, but want to have it as a container)

Hope i got you some ideas (: