I have an idea that I believe will benefit two target markets (don't we all). I have tried reaching out to one of the markets (food truck owners) online (email & Facebook): 4 in total so far. None of them responded. Is it because there's something wrong with my message to them? How do you get to the right people to validate your ideas? Do you try all sorts of methods before you finally give up? Is the lack of replies an indication that my idea won't work, am I executing my outreach the wrong way or do I just need to try to reach more people?
Cold cold calling is stupid and takes forever. Either set up dummy site or info and share it then ask for feedback. Quickest way (that my son did to great success) setup in a coffee shop and put an ad on Craig's list and offer to pay $10 for anyone who will come by and see your demo and give feedback. In one day and hundred dollars you will have your answer more than you can believe.