I'm not sure why the article mentions AppHarvest, who isn't doing a vertical farm; AppHarvest makes massive greenhouses. From their balance sheet it looks like they are selling their products at a massive discount and won't be in business much longer if they don't get some funding soon.

> Management believes there is substantial doubt about the Company’s ability to continue as a going concern. [1]

[1] https://investors.appharvest.com/node/8546/html