A roller coaster can cost anywhere from 5,000 dollars to 10,000,000 dollars.
Depending on the coaster, it could be anywhere between 3 and 10 dollars.
Normally, anywhere from 1 to 50 million dollars
Full-size Roller Coasters can cost anywhere from one hundred thousand to over 10 million dollars, depending on the size, manufacturer, etc.If you're really lucky, you might find a really cheap roller...
you might want to use knex if you want to build a model rollercoaster. the kits usually range from 40 to 50 dollars