Anyone can get a stove top model. These are saucepans with a tight lid and a special handle. The handle allows you to stir the beans, and a built-in thermometer keeps the temperature prime.
But, you won’t keep up with orders that way. Even the largest stove top size – which is about 250 grams – won’t supply even the smallest cafe.
If you have the space for a commercial roaster and packing area, you can do the business at home. But remember your premises will have to pass muster with the board of health.