I think they are the rubber maid storage containers on wheels...they have a few bins/drawers...thats what I got when I googled it...lol
I'm not sure if this is a lot of work or not
@Shizrock...because once its built then its just adding clones when needed really...from what I understand from the discription.
@dodacky ...sounds interesting, but pictures are would be helpful...doing 200-300 clones I found was like a job and it was a pain to water at times...lol