Do I need special tools to run speaker wire vertically from about light switch heigh to the floor? No fireblocks.
There's probably no reason that it won't work. Just feed the wire in and let gravity do its thing. Use a thin wire to capture the cable at the bottom hole. 

A wire puller is nothing more than a stiff wire itself, with a hook or eye at the end. I've pulled wires many times using a length of copper building wire or whatever I have on hand.