The way that helped me to narrow down resorts based on price, i did this on my own, was going on a cheapcaribbean.com or apple vacations website and doing a search of all hotels in the Riviera Maya around the time you want to get married. You'll get the prices of all resorts, be careful b/c sometimes there are extra costs, and then you'll have an idea of how much each resort can cost you so you can just cross off resorts that you think is too high for your guest to be paying.