If it's a 1man shop that's an actual gunsmith, then they know how to properly cut back a barrel. If it's your buddy with a hacksaw and a 3/4" drill bit, then not so much.
The real challenge setting back a Super Blackhawk barrel is that you have to locate and silver solder the front sight base, which in itself, really isn't that hard either.
Piloted barrel facing and crowning cutters are readily available, so even if a guy does cut it with a hacksaw, you can produce nearly as good of quality of face and recrown job as what can be done on a lathe. It'd cost you more to buy the tools and do it yourself than having a qualified smith do it, but I wanted to point out that pretty much anyone can produce proper results on a cut and crown job.
Since yours is blued, you'll naturally have to reblue the barrel, as the face/crown will be raw, and soldering on the new front sight will damage the finish on top of the barrel and the front sight base. Not really a big issue for most smiths, either they have the equipment and can blue themselves, or they send out for bluing, so either way you end up with a quality job.
HERE'S THE PROBLEM YOU'LL FACE WITH THE BIG REVOLVERSMITHS LIKE BOWEN.....
A $100 cut and recrown job with a $50 sight replacement and a $100 bluing job usually isn't enough to entice them to do any work on your revolver. They stay busy enough with "standard work," meaning larger scale action jobs and custom rebuilds, such that they don't have to nickel and dime projects together to pay the rent. They'll readily tell you that there are plenty of other gunsmiths (i.e. any qualified gunsmith) out there that can cut and crown a revolver. So if you want a small customization done by one of the masters, you'll likely end up paying around $800-1,000 for an action job plus the small customization you actually wanted.