Dear god that must have cost a small fortune to setup
We were buying a few for a client so I made use of the bulk buying power. It was just under $800 for an empty chassis.
The good thing is all the QNAPs run the same software so the functionality is similar across the whole range. Joshy's TS-412 is just as capable as a NAS.
ps. PCCaseGear is also good to buy from.