Plus the cost of better rockers...most general roller rockers are not good for SR setups...but it seems to be worth it in the long run to go roller IMO in a race setup (even bracket race).
I’m not an advocate of “budget oriented” rockers for any build, so whatever I would have used for rockers on a SFT cam myself, would be suitable (imo) for a mild easy-on-parts SR cam.
So, that wouldn’t be an added expense if I were building it.
Something along the lines of the old Crane golds are fine for that type of build.