back of the envelope, a thingomatic is $1300. If you get it working well, it'll happily print for days unattended. electricity and plastic i'd guess is less tha

back of the envelope, a thingomatic is $1300. If you get it working well, it'll happily print for days unattended. electricity and plastic i'd guess is less than a buck an hour. ABS plastic is dirt cheap. less than $20 per pound, stuff you print weighs a fraction of an ounce.