Are you seriously trying to suggest that carving the part plug, building a box, acquiring appropriate sand, packing the part into the sand, acquiring and meltin

Are you seriously trying to suggest that carving the part plug, building a box, acquiring appropriate sand, packing the part into the sand, acquiring and melting metal, pouring said metal, then finishing the part's surface is anything like the ease of downloading, printing, and waiting? Yes, building a 3D printer is an investment now. But cheap, common 3D printers are going to become a reality, and soon.