We seriously considered this because it is
stunning, but we couldn't get Las Caletas out of our heads.
It says to email for prices, at the time we inquired (2006) we were quoted $1000/night, 7 night minimum (ceremony/reception fees extra). There are 6 bedrooms and if you won't use all 6 they can reduce the rate (but do check guest list against passports upon arrival so no cheating). They can also arrange staff, babysitting, pretty much anything you need.
You may be able to have a wedding there without staying the week, but we didn't ask. Thought I'd pass it on to anyone looking for such a place.
Check it out:
Casa Valerie