Imaro
Legend
Imaro, let me ask you a question then. You said that you are going to take 6 months developing your game world. Not that you have to, but you are going to. If your game, for whatever reason, died tomorrow, would you feel comfortable starting that campaign next week? If not, how long would it be before you would feel comfortable starting to write adventures for that campaign world?
In all honesty, with what I have now, I would probably give myself two weeks. I'd also be asking my players why the current campaign died since it's exactly the kind of campaign you're advocating and if it was because there wasn't enough meat to the world I might ask my players if they want to do some one shots until it's to the point where that wouldn't happen again... otherwise it's all a waste of time.