However can I generate a multi-drive USB hard disc paddock?

What? Are you relating me you can not build something to handle containing a couple of off the shelf USB enclosures with a powered hub INSIDE of another container? Pick any type of USB enclosure you poverty, SETTLE, SATA or anything, stack them, add a fan to circulate flying just like the case next to your computer has, add a powered USB part inside and run out the single USB wire from inside at the part to outside. what's SO HARD here? You already said you can make things from acrylics, so reason is it so hard to put all the stuff, cables and weight supply included, DURING of another container you raise by yourself? I have what I call an "open air" computer, which consists of ii full height Seagate tough disks on their sides, a piece of plywood on peak acting as an insulator and the motherboard on upper of that. It all sits rainy-day of a clear 3 sided plexiglass box near my monitor seated by top. I added a slim C.P.U. ice chest devotee to blow over the hard drives all for cooling. It has been running that way for years As a file server. All I need to do is dust it rotten from time to instance since it gathers dust instead quickly being in the open element it is.