As far as I know, there is no resort called Kahlua Bay available through
DVC, but there is the Kapalua Bay available on the Concierge collection. Concierge collection trades tend to be very pricey for points. The resorts that allow direct trades through II will be more point cost efficient, but at teh Kapalua Bay, you will be able to rent individual nights. A week with an II exchange will be about 160 points for a 1 bedroom. With the concierge collection, you are mostly going to get a hotel room.