Is there a minimum order quantity for CAD training data?

No. You can commission a single STEP manufacture model. 

There's no minimum batch size. The only requirement is that the part follows real, manufacturable product logic rather than being a pure geometric exercise. Product category is open: consumer electronics, home appliances, industrial equipment, and small hardware components are all eligible for single-unit orders, as long as they reflect genuine production logic. This flexibility is especially useful for AI labs and companies running small-scale validation first, letting you evaluate data quality before committing to volume.