We have a static ip, gigabit internet, raid6, and a spare server for replication, so the next steps are figuring out a good snapshot and backup solution.
@th I would highly recommend using zfs as the filesystem, then you can use the tools "sanoid" for snapshotting and "syncoid" for replication
@th Modern filesystems such as zfs/btrfs or cephfs (if you need a clustered FS) do provide easy online snapshots of the filesystem volumes which could be easily replicated to the 2nd server. It would be interesting to know which solution you will be using.