Gree has repeatedly stated that it is technologically IMPOSSIBLE for them to provide more hood expansions. It is very doubtful that we will be given an option for a 'second hood' or even a building 'storage' option where you don't have to delete buildings.
One of my favorite aspects of Crime City is the IPH. I have every building I can get for my level (minus the Mansion and Techno Club). I doubt I will have any more room for the next set of LTB's.
With that being said, I know there are documents and spreadsheets for ALMOST every aspect of the game. I want to know if there is something out there or if anyone has thought about making some sort of guide for building placement. Basically the guide would help make the best use of the limited amount of space available so you can cram as many buildings in your hood as possible without deleting any. Or maybe I am the only person who cares about deleting my pawn shops? Haha