The event I was in such a hurry to build the prototype for was hosted in a partly abandoned, fully dilapidated farmhouse

It ALMOST worked first try!

As seen in the pictures bellow, the quad screen technology was actually working, however the projector that was brought did not support 1080p signals. And unfortunately the HDMI splitter is very strict on its output resolution being either 1080p 60hz or 4k 30hz (though with this Xbox setup 4k flickers off constantly).