For a project, I need to create a large display (most likely an LED matrix) that can be controlled via Arduino. Large means probably somewhere in the neighborhood of 3' by 10". I intend to use an Arduino R3 to control the display, and it will either have a bluetooth or RF receiver module installed on it, but otherwise empty. The Arduino (and presumably the display) will be powered from a nearby wall outlet (120V). What options do I have in terms of displays to keep the cost as low as possible. (I have several people pitching in money, but I still don't want it to be too high.) From what I have seen, a large LED matrix is not only hard to find, but also very expensive. Can I just somehow link together several smaller LED matrices, or is there some other option? I have no problem doing some programming to accommodate a strange setup if it is cheaper.
Edit: The only density requirement is for it to be high enough that 1-2 lines of text filling the display is legible at a distance of about 3-6 ft. (This display will be mounted along the side of a hallway.)