Every time one of these vertical/rotating indoor farms comes onto the market (usually via crowdfunding), it has roughly the same level of cost inflation. Haven't quite figured out who they are conning into buying these setups.
https://www.youtube.com/watch?v=lzcC6zkDDiY
I think he got a lot of flack for pointing out that the zip-grow towers are way overpriced and you can DIY them yourself reasonably well. There really isn't anything too-complicated about the ZipGrow towers, other than that they use a sponge as a media.