I managed to do all of what I set out to do yesterday! There are phantom rooms but who cares! This is what I was doing yesterday:
Wall off remaining unfinished rooms
Add front scaffolding
Add remaining roof windows
Now I must commit to the long boring task that is making all the windows for the rooms. I don't know how exactly I'm going to do it yet, but I do know it will be a bit messy. But, as long as the windows are in and they look alright, I don't care. I'm excited to texture the place and to start adding props and this window bit is the last bit of boring stuff I need to do. The only other boring thing might be adjusting all the door frames to fit a single door that I can copy and paste across the whole map. The windows? Not so much. When looking at the windows on Google maps and photos they all appear to be the same size and width apart, so the rooms must be the same size then right? They must be, but I really remember some rooms being smaller than others, they couldn't have been. For example, one English classroom was significantly longer than the other beside it, I swear it was. Anyway, doesn't matter I've blocked the rooms out already. I might make a preset set of windows and just copy paste that preset and nudge the vertexes so they line up with the existing walls, that might work actually. It should work with a few rooms at least.