What are your prerequisites? I'd hardly think buying 5 poppers should be an option and it's not even economical. From the 5 popper mention I am guessing you are aiming for 500gm at a time? A corretto setup would easily roast that and more, and provide a reasonable amount of control on the roast depending on your setup. The Behmor is obviously made to roast coffee beans so you can't go wrong with that, max amount of beans roast at a time is 500gms.