Most model rockets are built from kits. An average kit costs from 10 to 20 dollars, and can be built in an evening or two.
Most motors are used once and thrown away. They cost around 10 dollars for a package of three of the most common size, so flying your model rocket can be quite inexpensive.
Whether you build rockets because you enjoy modeling, because you like to compete with others, or because you just like to fly them, there’s plenty of others like you at ORG launches.