This idea fits the use of a RP server like a glove, and don’t worry, I’m not talking about Lion’s Pride Inn (so no need to get upset 
). Seriously though, I know all areas of SW except for Dwarven District and Old Town are routinely used as RP hubs so they may be good territory to claim (those two might be also but I’m not sure). There are also various other places that could be used of varying sizes and distance from larger cities. Something might already exist on one of the servers.
I can’t speak for anything Horde-wise as I have no clue on that faction other than them being my mortal foe.