Startup Idea : Weight loss spas and more...

I would like to start a booking site for weight loss spas around the world together with a marketplace for products and services destined to help them in their weight struggles . I am considering also designing some special program to be realized on cruises. However, contrary to traditional approach to this business, (diets and exercise), I would like to offer most of all a psychological perspective and put a focus on the problems underlying the eating issues. I think it's quite an innovative project and I would love to hear your opinion and ideally, to find sb to cooperate.