CNC machining is cheap. Owning/operating/buying a CNC Mill is NOT cheap. The price range is $1000 to infinity. Average cost for a new CNC Mill is $75,000.

Machining a part on a CNC Mill is very cheap is you already own the equipment. The costs are:

• Materials: Aluminum, wax, plastic, etc, are not expensive/rare materials
• Electricity to power the machine
• A technician to watch the machine
•  Replacement Bits
• Fixing the Mill if it breaks
• Lubrication fluid