I wonder if the dildos were used or new? If used, how did he clean them? Did he run them through the dishwasher? What are the logistics of of 700 dildos? He's obviously a depraved maniac, but I do have questions I need answered.
To solve your and Nisey’s concerns, I imagine an indoor train/conveyor belt system (or like some sushi restaurants)
Just grab the one you want when it comes around, put it back in the first empty slot when you’re done (phrasing) and its first pass is in a mini car wash situation In the next room