The first thing to do is raise the park entrance fee to $50. Then, squeeze in a couple of flat rides, and maybe a roller coaster if you have enough money for it. You could build a T-shirt Stall or two to rake in the cash. Then, advertise heavily on your park and newly built rides as it will get you cash to spend. By the end of the scenario, you will have already met the requirements, so do whatever you can to keep it that way.