
At that price point, look at getting a rotisserie attachment for your propane grill. Will allow you to go to French roast (which takes manual effort on the behmore) and easy to scale up. The Gene Cafe used to go to full French roast but is $650 and does 1/2 lb at a time. If you are willing to stand there, a kettle corn pan works on an outside burner. When you are ready to go $$ stretch for a 5lb or higher commercial roaster.