It is difficult to answer that question in the form you have written, since this is just a website with information and not travel accommodations.
However, if you are looking to go to Costa Rica in January, that is a very good idea. In January, you are less likely to be rained on every day, since it is the dry season there.
It would make a very enjoyable trip and you could visit one of the many great tourist attractions in Costa Rica. Either the jungle or the beaches, it doesn't matter as just about everything is green and beautiful.
I found that the people in Costa Rica were very friendly for the most part, except the taxi drivers were a little shady sometimes. There were also some very nice ones.
Check out the bed and breakfasts when planning your trip. There are some very nice ones and the amenities are plentiful. It is a bit more homey if that is what you like. Good luck on your trip!