As others have mentioned, there is likely to be some really low grade stuff in the mix that is not worth the time to disassemble. I would suggest looking into a small hammer mill, a conveyor, cross belt magnet and a zig zag separator. You would still have to hand sort the non ferrous and circuit boards. If you get a set up like this, I would suggest finding a buyer for Auto Shredder Boards and determine if you could sell under that category.