Ugh. So. The whole drywall/paint thing is nearing completion. I just have to re-scrub and paint the one wall tonight that the paper was on and put another coat on the ceiling. In the process of all this, I also fixed two other windows. Great way to learn how to mud drywall.
I think I'm going to sit on this layout design for a little while to make for sure it's what I want to do, then build it. Once everything is painted and cleaned up, I can put track down on the floor and see if it all makes sense.