What are your charges and how reliable is your final feasibility report? Ie. if you say an idea/business is bad, what are the chances that if we go ahead with the idea/business, that it turns out to be good. Conversely, if you say an idea/businessis good, what are the chances that if we go ahead with the idea/business, that it turns out to be a loss maker?
If you are not prohibitively expensive, start-ups could do well to use your services, if only to save themselves huge losses, later on down the line.
I myself, maybe interested in using your (or a similar) service. Any reports you compile could even be used to pass onto banks and potential investors.