Hmmmm. Let's see. 50 2BR units. If the average weekly cost is say 300 points, then that is 50x300x50 weeks for a total of approx 750,000 points.
If the average purchase is 75 points, that means approximately 10,000 new buyers. I'm quite sure GCV will be available for a while. Remember that by it's very nature, I think the add on contracts will be smaller as one and two week vacations to DLR are not common.
My guess, 1 yr to 18 months before sold out.