My off-prem backups are in a Tailscale connected NAS at my parent's house. I'm in the process of talking a friend into having Tailscale configured to host more off-prem backups at his place as well. I'm moving out of iCloud for photo library management and into Immich. I really don't want to lose my photos and videos hence the off-prem backups. Tailscale has been a blessing for this kind of use case