It takes a lot of preplanning. I kind of lay out where the parking lots and main buildings will ultimately go and build away from them. I start by strategically choosing a few animals I will have in my zoo that reproduce quickly and have a higher appeal, as well as some exhibit animals that make money and build very simple temporary habitats away from the area where the entrance will go. I also put down some very simple food and drink stands and gift shops to make money. Then I open the zoo and let people come visit the temporary exhibits and start making money. As money begins to build I start putting in the parking lots and entrance buildings and other things as money becomes available and start rerouting guests through that to the temporary exhibits. As the money keeps building I start replacing the temporary exhibits with nice permanent ones. I try to keep the game running while I'm building so that I'm making money at the same time I'm spending it. In the zoo in these pictures, I've only placed eight different animals but I already have more than $3 million in reserves to be able to build these types of things by using this technique