Math tutoring was my main gig for years around and after college. In New Jersey I had plenty of $50/hr cash clients (circa 2010). Some were even up to $100/hr.

Math tutoring was my main gig for years around and after college. In New Jersey I had plenty of $50/hr cash clients (circa 2010). Some were even up to $100/hr. It's an excellent self-employment opportunity with virtually zero costs (other than traveling to students by car).