Rapid Prototype 3D printers have been around quite a while, But now the cost is coming down the one we had at school cost 85,000.00 4 years ago, and the strata sheet that you build on is expensive as all get out, plus the media it's self is kind of pricy, There is a new system for home players that only costs about 1500.00, but it's somewhat limited. The programing is the expensive part, Solidworks plays nicely with the one we had at school.