I'm not answering your question, but wouldn't you be better off printing the walls laying down instead of upright? Otherwise any void area (under top plate, windows, doors, etc.) is going to require wasting filament to a light support structure that you'll have to cut away, similar to what you had to do here. Otherwise you'll end up with the droops across the voids like you see in the picture before cleanup. Printing flat would likely be faster, since the hot end could remain on the print nearly all the time. I'd also think it would be easy for such a tall print to come off the bed during printing, with proportionally small surface area on the bottom.

Of course, I'm new at this myself and I don't know the scale involved in what you're trying to do.