Since the press comes with dies, the cost of the press is the cost of admission.
However, a strong mount in conjunction with a bullet tray will almost double your production!
Since the SDB is an automatic progressive, it is the "safest" alternative to consistent and correct charging. I'm not saying it's fool proof, just that there is less chance for error than with other designs.
An SDB was my "production" press for many years. Worked great!
That I could be wrong is an eventuality that has not escaped me. I just painted the pictures as I saw them. I do not know how to do anything else. (Saint Elmer, 1955)