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.
The next thing to do is hire some handymen to clean up your park. Don't forget to set their patrol zones! The same goes for the mechanics. You will have a good park rating by Year 2, as well as 1,750 guests or more. The goal for this scenario is to get 3,500 guests in your park, so that requires some heavy advertising.
By the end of the scenario, you will have already met the requirements, so do whatever you can to keep it that way.