The more I play with my FreeNAS server, the more comfortable I am with my decision.
It seems like ZFS is a solid network file system. Also the other protections like backups, ECC RAM, UPS. Also this is not just the server, I have a backup server, I restore test server, and doing offline and offsite backups. I think I got a solid setup.
For the offline backups where the disks are staying offline but onsite. I setup another machine to check hard disks and SMART status.
Will do this with future disks.
As for the health front, I am getting a little bit of healthier. Gout still lingering, but I can walk again.