I have had problems on a couple of occasions with lots being hung while loading. The Hub was one of them and I deleted the pool lights. They were conflicting with the more important smart-lights2.
I get this problem with downtown lots as well. Loading with the debug cheat on shows a problem with the pool lights which is connected to Dizzy2's smart-lights, his updated smart-lights2 is ok.
The first version causes the pool light problem so you have to load up each lot with debug on, delete pool lights and save.