This, on the other hand (something that I found sometime last year) is small and simple.
If all of the USB cables went to a powered hub, or two, then you could quickly take it down and put it away.
My only negative on the setup is that the instruments would be somewhat hard to read as they'd be almost directly below your head. Moved back even six inches, and the numbers on the instruments would be much easier to read.
Even building it should be within the capability of most people.
