I am a teacher in private practice. Teaching is going along just fine as an occupation if you are responsible for actually meeting your clients needs and the clients are all free to shop for the services of another provider. My wife has been a teacher in private practice for her entire working life, and it is from her that I learned actual entrepreneurship and a dedication to deeply understanding a subject in order to pass that understanding along to client learners. The huge claim on everybody's taxes that government-operated schools have (and the claim on young learner's hours that compulsory schools have) make it difficult for a teacher to thrive in private practice, but not impossible. If you have a fire in the belly to teach, roll up your sleeves and teach. If you would like to break the oligopoly of the current government-operated schools, fine, do that too, but recognize that plenty of people like the current system just fine because it protects their jobs from competition at equal out-of-pocket cost to potential clients.