a good tool to pick up is the Makita 18V brushless cordless 5-7/8 in. metal cutting saw. It ditches the cord, meaning you have more maneuverability and don't have to worry about getting tangled up ...

You can always try to free-hand the cut ... 12 Amp saw and track together for $557 (the same price as the cordless Milwaukee kit) or you can get a similar kit for the cordless Makita 18V X2 ...