If I was making a lot of siding, I would go the "Arky resaw" route.
Two weeks ago, for the first time, I had an urgent request for bevel siding. Usually I convince the customer to simply use 5/8" x 8" flat stuff. This time, though, the contractor was trying to match the appearance of some existing siding. He needed some 9-1/4" wide material with a 1/2" bevel on 3/4 thick -- about 200 linear feet.
Thanks to several posts on the Forestry Forum, I knew exactly how to do it. I figured out the cant size I would need and then used a couple of pieces of 1/2" key stock to alternately prop up one side of the cant and then lower it.
Both the contractor and the customer were pleased as anything with the result. And if the customer is happy, I'm happy