You do not have to customize 50 different attractions like the description suggests, you actually only need to add 50 customization items to your attractions. You can do this with about 4 or 5 food/drink stands and a few plazas.... just fill all the customization slots with benches, planters etc. and POP!
This is easy to do in Freeform mode as you have unlimited money and you don't have to research new attractions.