Validating Demand: you need to get a simple questionnaire based survey( mobile phone friendly ) from different hotels and staffers about the inquiry they get from guest, they are a good first hand source of what guest look for. This will give you an area specific demand habits of people.
What issue you will face: It wont work at all is an issue everything else is a good news.
Non Scaling thing: Run a pilot in a area and make the platform hotel specific this will encourage the hotels to promote it too.