I, too, will gladly pay $20 success fee, but not if you cannot find me a better deal. On a separate question, where do you get the hotel inventory and pricing

I, too, will gladly pay $20 success fee, but not if you cannot find me a better deal. On a separate question, where do you get the hotel inventory and pricing data from? I only ask because you had mentioned that this was a small side project. Which makes me think there are structured data sources for hotel data. Thanks.