Kai, I would say keep it to one page. That is what I always try to do. Cutting out something less important every time I have something to add to it. Although if you feel you have enough pertinent material to add, do so. But definitely no longer than 2 pages. I personally like the one pager.
Might take a while, all I can say is stick with it if your heart is in it. You will enjoy helping to create new places in the real world.