I have three servers running these days.
One is a NAS that hosts the .arr suite and my torrent client. This is just to keep the media management in one place.
A N100 NUC that runs a lot of stuff in Proxmox, like Jellyfin, Heimdal, HomeAssistant, PiHole, Tailscale. I hope to add Caddy to this in the future, but I’ve never played with a reverse proxy before so I’m a tiny bit scared hehe.
Lastly is a inudstrial PC I got from work that hosts game servers. Right now it’s down as we haven’t had time to game, but usually it’s either a Minecraft server or Valheim.

For backup I have one copy on the NAS and I upload the most critical data to a cloud service I trust and pay for. This is now Proton.
My dream is finding a tech friend with his/her own NAS so we can set up a encrypted partition on each others NASes for automatic backup. I give you 1 TB, you give me 1 TB, life’s good!