What we actually run into: buyers who cannot get a gas connection, who oversize the machine, who price the weight loss wrong. No market reports — only things you can use.
Gas, extraction, floor loading, power and fire compliance. If any one of them fails, the machine will not fire — and the freight back costs more than the machine.
Most buyers order one size too big. An oversized drum runs half-full, the temperature curve drifts, and the coffee gets harder to roast. Here is the reverse calculation.
Green beans at 50 a kilo do not cost you 50 a kilo of roasted coffee. Miss this step and your margin looks 18% better than it is.
Do not put a good coffee through a machine you have never run. Three identical batches first, then talk about flavour. This is a procedure, not a recipe.