This is just my opinion, as no one can predict what will happen, but with the number of people moving into Charlotte and the amount of rentals I am doing, the rental market seems to be going strong. That being said, three bedroom condo/townhome units, except in high-rises, haven't seen that much rental demand IN MY EXPERIENCE. Most of my clients in the market for a three bedroom either want the luxury penthouse experience, or they want a single family home.
Other brokers may feel differently about the rental prospects of a three bedroom townhome. I will say the layout on the floorplan I saw was very conducive to a roommate situation. However, it's my opinion that a TRUE two bedroom (not bed and tiny office you're calling a bedroom) in uptown or southend will get snapped up more quickly, provided you don't grotesquely overprice.