There's still much left to do in order to become the world's largest and most diverse amusement park! Your family (one of four) has a small, but steady income that should suffice to hire a few showmen to bring life to the oh-so-empty park site. As you earn more, you can afford a favor or two: the police officer is kinder to you, you can hire a migrant worker to do extra work, and you can even finagle the attention of a promoter or a journalist!
The families will need to co-operate from time to time; after all, those grand attractions don't build themselves. In the end, the grand attractions are what will impress the crowds and bring about euphoric headlines in the newspapers!