For multi-color 3D printing, a daily twin extruder 3D printer, one which encompasses a single mount for the twin nozzles, is good enough. But don’t be expecting it to become as speedy as a single extruder 3D printer, considering the extra fat on the print head affects the print speed. https://titusbuneu.blogzet.com/multicolored-3d-printer-can-be-fun-for-anyone-44457453