I have very little knowledge about electronics, so I'm posting here for help about feasibility both in technical terms and ease of manufacture.
Ideally, I would need an RGD LED Matrix, something like this: 32x32 RGB LED Matrix Panel - 4mm Pitch : ID 607 : $29.95 : Adafruit Industries, Unique & fun DIY electronics and kits but spread over a big area, more or less 400 square feet (40 square meters). I would need each LED about 8 inches (20 cm) apart from each other and several feet of leeway on the back, between the actual LED and the circuit board. At least 15 feet (5 meters) between LED and board.
As a test, is it possible to take something like this: https://www.adafruit.com/products/274 and then "detach" the LEDs and
use some sort of cable, solder that to the board and then connect the LED at the end of the cable?
So for each LED it would be circuit board -> length of cable -> LED.
I don't need to display any kind of animation, just on/off and color (just for the final RGB board) for each LED or a group of LEDs.
I would also need some distance, probably another 15 - 20 feet (about 8 meters), between the circuit board and the computer controlling the matrix. I'm not sure if it would be easier or better for this distance to be between the board and the controller or the controller and the computer.
Finally I would also appreciate any help with the "shopping list" involving the project. I suppose I need the matrix and an Arduino or a similar controller, but besides that I'm not sure about power sources, cables, etc...
Thanks in advance for your help