"He who marches out of step hears another drum." ~ Ken Kesey
I have a pretty tight space and like to try to keep my inks on the opposite side of the press than the blanks. I think of it as a clean side and a dirty side. When I don't stay on top of cleanup my inks tend to migrate to the clean side and every once in a while I have an issue. I would suggest maybe putting the ink on the wall between exposure/washout and the vinyl area. If you run a super tidy ship it may not be necessary.
Here's what I've tentatively settled on for our space. A square would def be nice, I'm wondering how much exercise I'll get running films from the office to the darkroom every day with this.