Cutting and recrowning the barrel is the easy part. Dovetailing, soldering, or D&T’ing the front sight with appropriate alignment and cut to the appropriate height is typically the more expensive part.
The job can be done with less tools, but for me, cutting a barrel like that involves a chop saw, a piloted facing cutter, a piloted crowning cutter, a piloted brass lapping blunt, a bevel/radius cutter, then either a Dixie Gunworks dovetail guide and files for a dovetail sight like Fermin Garza’s, or a Power Custom front sight jig for a soldered sight, or the PC jig plus a wheeler D&T jig for a screw on sight. I’d have to go to my books or review online prices to be sure, but I’m fairly certain those tools tally up to enough money to have bought 3 or more Rough Riders.
A consideration also to be made - when cutting down a single action revolver, you can’t pick any barrel length you want without consequences. The old front sight location, ERH screw location, or original ERH screw location vs. new screw location have to be considered - as do the availability of parts and the practical functionality of the results.
For example - it’s easy to cut a barrel back to the same length as the original ERH, as long as the original front sight groove does not reach the end of the ERH. Else you’ll have an unsightly groove at the tip of your barrel in front of your new sight (may be covered with a screw on sight base). If cutting SHORTER than the ERH, then you have to cut enough to get behind the original ERH screw, and then need to drill another - which means either cutting to a length appropriate for a factory offered ERH, or cutting down and recontouring the end of an existing housing. The latter means you have to do several measurements to understand how much extraction length you’ll have left, then drilling a new ERH screw at the appropriate angle around the barrel, and hand fitting the new ERH for length (and ER, but that’s easy).
Hell of a lot of work for a revolver which could be replaced with a factory model of your desired length for $200.