The Oxi Pipe is a great idea. Having all the CVs in the Rack will be very helpful.
You mention that you’d need only one cable HDMI to hook it up because there’s battery operation.
But couldn’t it also provide power? A simple DC/DC converter in on the +12V rail would do the trick.
Battery operation is great and all but since there’s a bunch of RGB leds power consumption would be significant and battery life a potential issue.