According to my recent ticket purchase, departure tax/fee is now $36. I did not know it was not included when flying from Canada. From my ticket receipt.:Sint Maarten - Airport Departure Tax (SXM) (FH) $36.00 USD

If you are renting/exchanging as a timeshare then the $50 timeshare tax will apply for each week or partial week. If renting/exchanging as a hotel room/rental, the $50 will not apply but you will be hit with 15%-20% tax/service charge plus (I believe) a $10/day "resort fee".

There are two 6th floor 3 bedroom units but one is a wholly owned unit and I doubt ever rented out. There is at least one first floor 3 bedroom unit and it is on the drawbridge side. I am personally not aware of a 3 bedroom unit on the opposite end but it may well be there is one there also.