Purchased (2) 12TB drives from serverpartdeals.com. Just one would hold everything I have in a motley collection of drives. Impressively they came WITH both a pin3 disabled power cable AND a card with a little kapton tape and instructions. As I am using a Sabrent 5-bay (eBay find, decent price for a non-raid external) I used the tape to disable the pin3 reset. Discovered I need to cut back on the caffeine as my hands were shaking WAAAY to much to make that easy. But it is up and running. Figure I will run these two as regular or raid 1, then once I order two more go raid 5. Now to spend some of the weekend using an external SATA dock to try to reclaim files from a stack of old bare drives, then my misc external drives. Suspect this will take a while.
Now to research software raid programs . . .