For comparison here is a video from Wired of the Tesla manufacturing facility now:
http://www.youtube.com/watch?v=8_lfxPI5ObM&feature=share&list=UUftwRNsjfRo08xYE31tkiyw
They sell enough to justify a assembly line and plant?
in the past 12 months I have seen 2.
Very, very cool. Watching these machines reminds me of a well choreographed ballet. Amazing stuff.