Cleaning is as simple as the whole concept, it's as if the team behind the design have not been influenced or even seen a fermenter, I am a great believer in keeping things as simple as possible, this is so simple I am jealous.
I expect KK to be putting something up today or tomorrow, the parts for the proto type I believe were manufactured on site, so once they have everything sorted the parts will be manufactured overseas. Cost I wouldn't have a clue, but if it was me I would certainly be milking it before it got copied