One thing I'd add is make sure you're snapshotting via ZFS or something similar, because the most likely cause of dataloss is accidental deletion, and if your synced copies are perfect replicas, they'll replicate the deletion, too.
If I could speak directly to the op I would recommend flipping back to a "rightside up" model and doing dumb, mirror, 1:1 backups to rsync.net and then configuring a day/week/month schedule of ZFS snapshots on that end.
Those ZFS snapshots are immutable / read-only so they not only serve as retention, they protect against Mallory (and ransomware and malware, etc.)
