Looks like you can get refurbished 26TB drives for about £340, so 12 of those. PCIe -> 6x SATA adaptors run you about £40 each. Molex to SATA power adaptors about £5. So £4200 will let you store all that with a bit left over for postage and some duct tape to make a storage bay out of the boxes it all came in.
I'd probably want a few more drives for RAID6 and some hot spares, but if you go JBoD then at least you can just download the torrent again ;-)