After the film, I just always figured that since sparks were flying through the house that would be the most of the damage, but as I considered that the roof DID have the spiritual energies flying out of it, there must be some kind of balcony (it seems as such) on the second level and then they went thru the third floor to the roof. If that were so, then there wouldn't be much damage, because they would come from the unit, up the steps, around the balcony, and then through the 3rd floor and ceiling.
I agree with what was said earlier, had it been like shown in RGB, then the walls definitely wouldn't have been there. Plus, to repair that much damage and replace that much content in the bldg, insurance or not, would be too expensive and they'd just have to move to restart the business.
I think…