An idea is you can't get a loan you have to pay for new rooms with your own bells and you can decide when you get a new room or if you don't want another. And maybe have about 5 rooms max on each floor and each are about the size as your large room in WW
Another thing your neighbors should upgrade their own houses instead of them remaining a tiny one room house. And you should be able to have unlimited rooms in your house.
Your neighbors should react to what you say. It kinda gets old when you tell them to die and they send you back a mail saying thank you and that you are wonderful. They should know you just sent them a death threat.