That might work fine for you. I'm sure you can build beautiful frames and it sounds like your a well qualified metal worker. But I'm not sure that would apply to your average photographer looking to frame a show. Why send somebody to a "golf shop" to do a custom job in a production facilty with saws intended to make golf clubs, when simply calling a frame shop to do a routine job - with the correct tools - is so much easier and cheaper? Again, present company excluded.
My advice to those listening in..... Go to a retail outlet or frame shop to buy frames. Unless, you are a metal worker or have a frame shop in your basement, in which case I would go that route.