I think if you consult and happen upon a need that can be solved by a product you could be successful. In that case maybe 1 in 10 or 1 in a 100 would happen upon such an idea and execute. If you plan to do this then you are planning to be one of those 1 in 10 or 1 in a 100 which means under the most generous assumption you have less than a 1 in 10 chance of success.