Will any of the dents come out using paintless dent removal? That could be a start to try and knock the bill down and it's better for your car than filling it with filler and having panels painted. I know a very good dent guy and he did my old Focus & Cosworth. Has he got any photos of the damage? Where does the guy with the BMW live? I reckon my man could certainly help out here if he is local to me.