Talk:XP levels/@comment-83.21.139.214-20110911103957/@comment-3991817-20110911133632

Well, it all depends on which buildings are available to you, how many times a day you collect money and how much money you have available to build new buildings. So you yourself are the only person to know which building to choose.

I am not sure if I understand your second question, but it is not better to demolish a building and replace it with the same kind of building. You have twice the construction costs in this case, which will take you some time to earn back.