I've been storing a lot of data somewhat reliably at home, but with my family now entrusting me with their photographs, it was time to up my game.
I'm setting up an HDD NAS for offsite backups. My home storage and media server was already running NixOS, ZFS, sanoid & syncoid (between a zpool of 4 SSDs and a zpool of 8 HDDs and 1 L2ARC SSD partition). A little bit of copy-pasting in my flake repository, nixos-install --flake github:pcarrier/sys#hare, and I'm now mirroring the most critical data to this cheap device over tailscale.
It'll relocate to a family member this week end. At that point I'll have a fast raidz regularly snapshot, with snapshots mirrored to a local raidz and a remote RAID1.
If you're serious about self-hosting and would like a similar setup, I can help you get started. Feel free to reach out!