Goodness me! As a private teacher on the internet it is not possible to walk into a situation where you have 30 student hours a week within a week or two! It takes a year or two of heavy marketing work to get that number of students!

Your comments also don't make sense regarding proofreading. It seems the job was Proofreading? Proofreading to me is the checking of text done by a translator. Are you trying to argue that proofreading is unethical???