The lot (if I'm looking at the right one on google) appears to be several acres at least. Browsing Candlewood's website, I'm seeing they have mostly 3 to 4 stories, with the rooms spread out over mulitiple buildings in many cases. So based on their existing stock and the room available to them at Ft Sam, we might be looking at the rooms being split up.
Of course, its likely none of their existing hotels has 981 rooms, so all bets are off