To OP: I would say don’t quit orchestra. Your son will learn how to play woodwind and brass instruments in methods classes in college, so he’s better off expanding his skill set with strings so he can be competent in both types of instrumental settings. There is also currently somewhat of a string teacher shortage, so if I were him I’d consider how that plays into his whole process. String teachers also generally don’t have to do as much as band teachers since they don’t have marching band, pep band, etc. They might get paid a little less but they can make up for that with private lessons that pay a lot better than the supplemental contracts for taking on extra-curricular music activities that band teachers typically have.