A few friends have done this, was around £150-300 - varies on how long you want to do it for, and you can pay extra for a quick start rather than waiting months. It’s a generic plan, 800-1100 cals, he doesn’t even really change it through the weeks so you could spend 5 weeks on the same diet with hardly a word from him. I’m not really sure why anyone else says is still buying into his crap!!