Have you considered a 'hint' feature where people can kind of recommend hotels that are not yet in your database and could be considered personal tips?
I like your service. However, I am not sure if 100 updates are too many for a small business. You could instead promise "invested time" into each update. That might not be as measurable as a definitive number of posts but as a small business I would rather get 50 good, thought-through posts than 100 superficial non-sense updates.