Are you looking to hire employees in Costa Rica or just work yourself while you live in Costa Rica? If you plan to hire, learn the social security system and labor benefit laws. They are very different from North America. If you are just working yourself via computer, you don't need a lawyer.
If you need long term apartment rentals or commercial rental space, you can check For Rent Costa Rica
. Skilled labor is easier to find in the capital, so keep that in mind.