There are usually multiple strategies to successfully completing a scenario; these can be discussed on the scenario's discussion page or written down in an existing or additional section of this article.
Develop some rides while the ostriches breed. Since you need $200 in ride income, you have to set prices. As soon as you can sell the ostriches for $4,000 or above, sell them immediately. In the entrepreneur level, build some roller coasters to increase profit. In the tycoon level, fill at least one eighth of the park and set the prices of the rides.