I'm a high school teacher that was fortunate enough to pick up a 3d prototype printer this last year. We got the Desktop printer (capacity approx 8 x 8 x8 ) for around 16k. We are using the soluble support material, so students can draw complete assemblies, print, and dissolve out the middles. We looked at the Z-corp powder printer (corn starch type material) and when the salesman accidently dropped a part on the floor and it went into a million pieces, we knew that one wasn't the one for us. Just my two cents.