That said, if you find you are having real trouble recruiting even four or five prospective customers for this effort, then it's very possible you're chasing a problem that isn't that important, and you will almost certainly have a very hard time selling this product. This is one of the very first reality checks (aka demand validation) to make sure you're spending your time on something worthwhile. If customers aren't interested in this problem, you may want to rethink your plans.
