Your verbal score is reflective of the amount of time and effort you put into preparing for it. No amount of tutoring or tips will benefit you if you don't spend the time needed to strengthen those skills. Much like building a muscle, it requires diligence and determination on your part.
Unless this guy can consistently score 15 on Verbal Reasoning, I would take anything he has to say with a grain of salt. A lot of people boast about their strategies, but at the end of the day, it's all total bs. Only you can decide what works best for you. Stay confident and keep pushing hard, and eventually you'll see the results.
And even if I had the money, that's a ridiculous amount to spend for one section. 😱