To ms.mathilda
If you are still seeking information on apartment availability and cost in an around Sosua, I'd suggest that you post this as a new question. That way you are likely to get responses from people who had read your thread before you posted the apartment question and may not come back to the original thread for another look.
I would think that your chances of finding something desirable are good. Tourism has been down this year and next season, at first reports, doesn't sound as though it would be much better.
There are some very fine people teaching at the International School and I'm sure that they would be glad to help you. Whether or not they read this board, I don't know. You might post a third thread asking to make contact with people who teach in the school.