While there's lots of space for expansion, this park isn't to be taken lightly. For before you can build the required numbers of roller coasters, you have to have earned a lot of cash.
Start by putting non-tracked rides on the sides of the main road on the map leading to the Wooden Roller Coaster, and charge it for $7. After getting the right amount of guests, this coaster can make you about more than $10,000 if you charge it at that price. Charge the gentle rides at $1.50 and thrill rides at $3. After you have enough cash, start building coasters.
Start with the Corkscrew Coaster, since it's really easy to get a high excitement rating by just putting 2 drops, couple of special elements and helixes regularly, and you will get 7.xx excitement rating. Charge it to 7$ too, but make sure you build it close to the entry of the park, so your guests will get to your new coaster faster.
Continue with your favorite types of coasters. You have plenty of space, so you can also build small coasters with 6 excitement rating by adding tunnels and scenery. Eventually, the scenario is not so hard; just make sure you repaid your loan before building your 10th coaster.
Some suggested roller coasters that are cheap, compact, and exciting enough are:
- Cobra (Corkscrew)
- Percolator (Spiral)
- Bumble Bee (Looping)
- Lava Launch (LIM Launched)
- Fungicide (Wild Mouse)
- Circulator (Inverted Impulse)
- Wheely Reel (Virginia Reel)
- El Condor (Compact Inverted)
- Flight of the Phoenix (Suspended Swinging)
- The wooden roller coaster provided is exciting enough.
Some of those do need to be researched; this list may not work for you, but it worked for me.