Basically, the solution to a problem should not be more complicated than the problem itself. Not only is the question "Does my invention already exist?" a decisive one, but also: "Is there a market for my invention at all and where are my markets?" This relates to the issue of exploiting a patent: Who needs my invention and where? Please consider that patents are not confidential. You have to share your knowledge with others as your application will be published no later than 18 months thereafter, regardless of whether a patent is subsequently granted or not.