If its steel, then you are definitely going to need either a bandsaw or 14" metal miter saw.
Search "dry cut" saw and you will find tons of info. Bandsaw would be another route.
There is a company called Evolution Tools that makes a multi cutter, there are a couple of models. Mixed reviews. Personally I would avoid them? Get a dedicated saw for each, even if its a abrasive 14" ($100) and a 12" wood miter saw ($100).