Though DISboards are pretty knowledgeable as a whole, I would recommend you ask the TUG (Timeshare User Group) boards as you will most likely get better information. It's an external site.
Edited to add: Getting a 3BR might be tough. Could you reach your goal using multiple 2BR units?
Available right now in RCI's Extra Vacation inventory, offered through the DVC member website:
Coconut Bay Resort (#2626)
Fort Lauderdale, FL USA www.coconutbay.org
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