A heads up in case you weren't aware, the following are probably the two most popular ZFS automatic snapshot management tools that can also send:
https://github.com/jimsalterjrs/sanoid
https://github.com/yboetz/pyznap
The developers of these are active over at r/DataHoarder/ and r/zfs/ in case you have any questions.
I actually have my own that I wrote for personal use: https://gitlab.com/wheybags/zfs_scripts
However, we will probably just be using rsync for backups, since we still intend to use a pair QNAP nases as a backup targets, since we've got the hardware already. It's not ideal, but at least it's just for backups. And if one of them fails, we can still read the drives using the other one.
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