When traveling to Costa Rica, especially with families or a group of friends, consider the rental home market. There are numerous properties in C.R. beloging to foreigners who, in many cases, rarely use them. Depending on the size of your group, it may actually end up being cheaper to rent a house, perhaps even right on the beach, for less than what your hotel rooms add up to.
There are a number of sites online that feature rentals, but the one we recommend is HomeAway.com.