For the networking aspect, you could create a hybrid. i.e. set up a VPS VM, though 1TB disk space will be pricey... but then you could have sftp chroot and use

For the networking aspect, you could create a hybrid. i.e. set up a VPS VM, though 1TB disk space will be pricey... but then you could have sftp chroot and use lftp and it's mirror subsystem to get the same effect as rsync, but more secure, then have a client at home which pulls down that data to the USB drives. Maybe it just does lftp to one USB drive at home, then rsync copies from that drive to a second drive for redundancy and/or use rsnapshot for versioning.