I don't know what kind of equipment you have. A band saw will pump out a lot of nice wood siding, trim, flooring porch hand rails and so forth.
A scroll saw will make small gingerbread (corbels, etc.) for exterior details.
I used to pick up chunks of old growth redwood cedar from the waste of cedar mills here in the Pacific Northwest, band saw them into chunks, then split them into shakes.
The reason I have what you want is, I never lent it out before.
Scraps are a myth.