Expat
Focus: Move to Costa Rica Easily provides information and resources
for a large number of countries, including Costa Rica, with articles on a variety of subjects to inform you about what is involved in moving to country and trying to make it easier — not an easy task.
Justlanded: Costa Rica provides forums, guides, job postings, housing, and classifieds for expatriates.
Numbeo: Cost of Living in Costa Rica. A fine crowdsourced site that provides information about the cost of living in the Costa Rica that should help prepare you for the transition.