I threw a NAS in a friends house that is configured to bootup and reverse ssh tunnel to my rack where it then accepts scheduled encrypted duplicity backups.
I do not even need to trust my friend as duplicity encrypts all data against a yubikey held pgp keychain before it leaves.
The backup NAS could phone home from anywhere with internet access.
This is very slick.
Apparently, I need to make some techie friends.
Tarsnap is pretty affordable for off-site backups though!
the friend doesn't need to be techy just have a house
Well, a house and some kind of NAS or at least a computer that is always on. But I take your point. This idea is brilliant though!!
I expect one buys the NAS themselves and pay electricity