That is a tough one. No one is going to have availability on that since they are all booked and rented out. Based on the points chart, that reservation is 637,000 points. Based on the rental rate of $7/1,000, that would cost $4,700. To get it under that price point, he has to do the cancel/rebook strategy that no longer exists with the Wyndham change. The minute he cancels the reservation, the system collects the unit and gives it to the first person with *Upgrade* active, then so on down the line. Eventually, a 1BR Dlx would be what shows up in inventory, not the 3BR Pres.
I don't want to alarm or scare you, but I would be extremely skeptical that you will get this reservation at $2,400-ish. That is why he offered you the refund to begin with. He is probably not responding because there is no way he will be able to deliver at that price. He'd be losing about $800 on the reservation. There are other places that are just as nice but a little bit farther away. Reunion is another Wyndham resort. All units are 3BR and they are gorgeous.
I recommend having contingency plans because this sounds like a train wreck waiting to happen.