Sorry for the late post, but there is a much. MUCH more simpler way. But, it might be VERY resource-demanding and takes time. Rebuild the house, and make the doors open up, like 'wooden doors' and 'iron doors', and boom you're inside the building without loading time. After you have that part cleared, make the window-glass invisible, and add some metal in the middle to make it look, umm, like in the age Skyrim is in.