Good for you. You solved your own problem. Personally I do not consider it a problem, but I am glad you got it working how you wanted.
I thought you wanted the heating costs (power and currency) to be based on the number of tiles considering the experiments you outlined. That mistake was mine.
I will say, though, with the nature of the lot bluffs themselves, while they could do it like you I doubt they world. Retroactively changing previous packs is very rare if done at all. I created a thread to see if anyone remembered it happening, because I did not. The bills was for everything, so that is what they considered. They did not go back and fiddle with previous packs beyond the new base game feature. If they would do those things, it would be a lot better game.
