Joe, a number of the sizes you need are commercially available. For instance, 1", 1.125", 1.25", 1.375" and 1.5" tube all in .035" wall are all common sizes in 4130. This would be a LOT easier than trying to roll tube as small as one inch diameter.
Not trying to say you shouldn't do this as a project, but if you are making something for sale, like your other accessories, it would sure keep your time investment down.
Dean