U really think that's any cheaper? My sister got married Cabo, and it cost her just as much for a wedding with 40 people on the beach as a country club wedding with 150 would have back home. You end up having to pay for a bunch of people's rooms or entire travel, resorts soak you in every way possible, and you still pay for the band, cake, flowers, photog, etc. just like you would have at home. The vendors are just as sophisticated down there as they are in the States. Now, if you're truly going to just set a weekend in Costa Rica, see who shows up and have a nice dinner, you're probably saving real money, but most people want more than that if only because their (her) sister, cousin, bridesmaid, etc. had such a nice wedding.