If I only spend $1000 on hydroponics and 3 weeks tending to a vertical garden I can grow a $1 head of lettuce FOR FREE!

I tried growing lettuce in some cut up plastic bottles at university in soil from the nearby footpath, I think even with the cheap student approach I spent more on the (single pack of) seeds than a fully grown lettuce costs, and only managed about four individual leaves that were only about 1cm by 5cm.

What if I haven’t spent anything,

and I’m making money with lettuce I grew in the woods?

(or, in Anthropic/sama’s backyards)