There are 4 ways how to get from San Jose airport to the house:
1. Private transport from the airport to the house, this will take you more or less 4 hours depending on traffic, the cost goes from $170 to $200 depending on amount of persons.
2. Shared shuttle, from San Jose for 49pp, pick up at hotel in San Jose and drop off at the house
3. Taxi from airport to bus station, then public bus to Puerto Viejo. This way is the cheapes, I can organize a taxi to pick you up at the airport and bring you to the bus station to take the direct bus to Puerto Viejo.
4. Pacuare river rafting, this is the funest way to travel from San Jose to the house, even from Arenal to Puerto Viejo in case you are in that area. The pick up would be at the hotel in Sa Jose or Arenal around 6:00am, then a drive to Siquirres where the river is, 4 hours of fun rafting including the breakfast and lunch. Then drop off at the house! The price is $99pp
In case you have any questions let me know I will be happy to help!