Dunno exactly what you mean by clean copper wire. Do you mean bare bright scrap? Bare bright unused production scrap? Post-chopper/granulator Cu #1 or #2 slivers/pellets? Your best bet is going to be at a major shredder yard that processes lots of wire and basically lock them down as a supplier. Otherwise that quantity is gonna be hard to find weekly. Like toonces said you're gonna be competing with folks from everywhere but Antarctica buying at that quantity.