Creator of the Cheetah 3D printers, 1 cubic meter build volume. We use ABS granules the raw product for filament, therefore our cost per print is significantly lower. Our cost per kilo is less than $4\kg for ABS granules.
We can use up too a 3mm nozzle and get 0.5 Kg\Hour flow rate. Smaller nozzles will have much lower extrusion rate.