There are some other ways to get a good park rating... MWUAHAHAHA No, seriously.
Here's a good way to get a lot of money:
1) Go to the steel rollercoaster section of the rollercoaster section of the rides section. 2) Pick BUILD CUSTOM DESIGN. 3) Start with a good-sized station platform (eight squares is big, but good). 4) Put in an On-ride photo booth. 5) Put the following pieces in: (I'm making up the names, but I think you'll know what I mean).
Flat to small hill Small hill to steep hill Steep hill to small hill Small hill to flat Flat to small drop Small drop to steep drop Go as low as you can with the steep drops underground. Steep drop to small drop Small drop to flat Flat to small hill Small hill to steep hill Go high back to overground and make the height about 15 yards above the original hill.
6) Put in an entrance, exit, paths, etc. 7) Go to the area on the ride screen with the gears on it. 8) Instead of CONTINUOUS CIRCUIT MODE, use POWERED LAUNCH MODE. 9) Test out the speeds until the rollercoaster train gets near the top of the second hill. 10) When you're done, open it! The price should be form $2.00 to $2.20. I usually name it something like THE KILLER or THE DESTROYER. You should also do a paint job if it looks ugly.
This rollercoaster will be REALLY popular. It can earn you over $4000 dollars an hour sometimes. :D