I have a similar lack of interest in opening up a tower to swap drives. QNAP has some nice JBOD enclosures. If you don't want any 2.5" drives their biggest enclosures are 8-bays, so you'd need an ATX tower with three available PCIe slots to run all the SFF cables for 3x8 drives. You would need to manage your own software stack with Unraid or w/e.