Trinity Islands/Scenario Guide

First step would be to cut the path off at the end of the first island (such as in Evergreen Gardens) and then start off by building a Steel Mini Roller Coaster : a cheap yet effective custom design should roll in some money. Research priority shoudl: be set on Shops and Stalls until the Information Kiosk becomes available, like in Evergreen Gardens, it will become necessary to prevent guests from getting lost later on.

Then, pleyrs should build all the thrill rides they have, before starting build another small roller coaster - this will attract about 350 people. Now, players can join back the path to the two other islands, wise players would join a path up from the first island to the third, and the wisest of them would build a Chairlift from 3rd island to park entrance for some extra money.

Once this is done, extra staff will come in handy. This park will need at least five Bathrooms, and two groups of shops. From this point onward, the scenario's straightforward : Building new rides as they come, along with the occasional roller coaster and new staff periodically. By the end of Year 3, the scenario's goal should be long reached.

Tips
If things are getting cramped up on the islands, a wise player would consider building beneath them, underground. This is tricky on the first one, but the other two have a decent amount of volume for construction. A low enough tunnel would even go beneath the water, essentially freeing players from constraints to one island.