Okay, I understand. Then, if I can direct your questioning in a more focused manner... what aspect of the economics are you interested in?

If it costs you $50 to build a system that can grow hundreds if not thousands of dollars in produce and meat, do you need a specific study to justify the process? If so, I can get you some numbers, but there's really no need because you will get a return on your investment in 1 growing season (unless you purchased expensive prefrabricated systems, but you're here at DIY AP so I would imagine that is not your plan).