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I think if you can prove that you can scale revenue or users by the factor of 1,000 within 2-3 years, while only increasing headcount/staff by the factor of 10 then they would be interested.

That's basically the definition of a startup, so na matter what you do, if you can prove scalability like this, you are a startup.

YC has backed at least one startup for indoor farming lighting, Transcend (S15), and one for indoor gardening, Click & Grow (S15).

And FarmStead (S16) for crop monitoring.

Farmlogs went through YC in 2012.

http://www.paulgraham.com/growth.html