I can't think of a legal retail business that will allow you to do that combination. In Central Florida, the number of dive retailers is shrinking. Too many stores were in pursuit of too few dollars.
The way to get that kind of return is to develop and patent a product that is the next big-big thing. A sensor for nitrogen in a diver's bloodstream? A fin capable of compressing water? A regulator mouthpiece that is mint flavored and whitens teeth! Maybe an exothermic cream that you rub on and takes the place of a wetsuit. (No, not Ben Gay.)
The way to get that kind of return is to develop and patent a product that is the next big-big thing. A sensor for nitrogen in a diver's bloodstream? A fin capable of compressing water? A regulator mouthpiece that is mint flavored and whitens teeth! Maybe an exothermic cream that you rub on and takes the place of a wetsuit. (No, not Ben Gay.)