You can collect money from the front gate, attraction, or business at any time, without waiting for the coin icon to appear. Tap the building to collect its earnings. When building roller coasters, design your own instead of spending coins on templates. Place as many booths and hotels as your park's guests can use to generate revenue. Upgrade them whenever possible. In the "Build" screen, look under "Specials" to find the "Food Rush" event. Build it and use it to gain additional money and experience. It is a mini-game that pays you to flip burgers. Play it while waiting for other tasks, such as construction, to complete.