Norco 4220, 20-bay hot-swap case with all trays, backplane connectors, and as an incentive, included is a supermicro usas2-l8i dual channel (8 port) sas controller and an HP 24-port SAS expander.
This allows full control of 20 hot-swap drives (none included at this price) and the sas card is flashed with JBOD capable firmware, to allow you to do a number of types of hardware raid, or a mix and match JBOD and ZFS for software RAID.
The case also includes an 850W modular PSU installed and cabled out to the backplanes already.