Love the idea of the side by side setup.
Noted your bulky Computing setup though. Have you ever considered running on ultra compact fanless PC's ??
Fit PC are in their 4 or 5 generation now and can be run totally monitor-less and keyboard-less. You just use a tablet like a IPAD or Samsung to connect via wireless using remote control/screen software and the display comes up on the Tablet.
Then you can still use all your favourite PC software for controlling all the gear.
Will give you back all your shed space and reduce your power overheads.
http://www.fit-pc.com/web/