They have some 10TB helium for roughly the same price/TB.
https://www.newegg.com/seagate-exos-x10-st10000nm0126-10tb/p/1Z4-002P-022A9?Item=9SIA5ADK030931
I'm not sure what the difference is. They look like the same drive with a different model number. 3 x 10TB in RAID 5 -OR- 2 x 20TB in RAID 1? Decisions, decisions....
Buy a new N100 microPC with 32GB RAM and m.2 drive, Sabrent 5-bay USB_3 DAS, a couple 10TB drives. Easy low-power single box home server with room to expand. You also could add a good switch and box of Cat8 (cable always > WiFi)
Spend the rest on another hobby!