Point is to be remote/off site.
Discussion
Any reason for it to be remote? Or do you just want it to be available online?
In case the house burns down... Removing the single point of failure.
I have bought a sub 25watt mini PC and have used something like StartOS to use the FTP over TOR. Plus you could run your own Private Nostr Relay, vaultwarden for password management, and a personal Comms server. You hook it up at a family member's house and put it in a closet with a big sticker that says "Before unplugging talk to nostr:npub1wnlu28xrq9gv77dkevck6ws4euej4v568rlvn66gf2c428tdrptqq3n3wr "
That's worked pretty well so far.
And what do you back that up to? Presumably not itself?
That IS the backup. I gave my main PC and web server at my house. All backups are pointed to the mini PC. I have a cal backup on site then the redundant backup off site at a family member's house. (Different state entirely). You could theoretically backup the backup to a cloud service but I don't trust them nor do I want the process to take a day, like you said.