It sounds very exciting to me a trip to Costa Rica. I have never been there myself, but I can certainly recommend the following accommodation. It is managed and owned by an old friend of mine (we used to study together) and you may want to check it out.

http://www.balcondeuvita.com/

Regards,

Bard Vos Arroyo de la Miel - Costa del Sol (Spain) http://www.apartamentosmundial.com