Someone has to make sure the site is still running.

Yes, but you’ll be wishing you had 8 bays when you fill the 6 :) At some point, you have to replace disks to really increase space, don’t make your RAID volumes consist of more disks than you can reasonably afford to replace at one time. Second lesson, if you have spare drive bays, use them as part of your upgrade strategy, not as additional storage. Started this last iteration with 6x3tb drives in a raidz2 vdev, opted to add another 6x3tb vdev instead of biting the bullet and upgrading. To add more storage I need to replace 6 drives. Instead I built a second NAS to backup the primary and am pulling all 12 disks and dropping back to 6. If/when I increase storage, I’ll drop 6 new ones in and MOVE the data instead of adding capacity.