and ditto the people thing. Main reason I don't persue it more often is the human factor. Depending on what you teach/offer, you likely wont be teaching "fun stuff" to wonderful willing people who hang on your every word.. whats more likely is you will be repeating the same potty training/loose leash/other simple task speal over and over to dense clients. Client compliance is a huge issue.
I personally do not recommend you follow the methods of either of those TV trainers. They are not reality based, and rely on pseudo science that is easily debunked.