I happily assist in that, even we can establish the model. I suggest creating a spreadsheet that allows you to change the assumptions by typing new information to the input page. What your key questions are? Net present value (NPV), profit, internal rate of return (IRR) revenue, necessary capital, length of the project, sensitivity to different costs and selling prices, uncertainty analysis.

Costs:

- land --> can be 0, more realistically the rental cost,

-  seeds

- chemicals

- energy

- labor

- depreciation of the machinery and infrastructure

Capital:

- Machinery and infrastructure (buildings, roads, all installations you need)

Finance:

- Equity and loan, expected interest rate

Revenue:

- The selling price of the plants and the production

Please contact me if you want to work on that together. Free of charge.

These links may help you

https://ageconsearch.umn.edu/bitstream/97085/2/33.%20Cost%20benefit%20of%20cocoa%20in%20Ghana.pdf

http://www.scienceandnature.org/GJBB_Vol3(3)2014/GJBB-V3(3)2014-17.pdf

http://pdf.usaid.gov/pdf_docs/PA00JN6W.pdf

http://nptel.ac.in/courses/126104005/LectureNotes/Week-7_04-Cost%20benefit%20analysis%20for%20the%20case%20study%20done%20on%20crop%20management.pdf

http://www.nrc.govt.nz/contentassets/777ba09250b64bc699308b78ed3c10b9/cost-benefit-analysis-report-rpmp---august-2017.pdf

Conference Paper APPLICATION OF MULTIMODAL TRANSPORT MODELS FOR COST BENEFIT ...

Article Cost-benefit analysis of the intraoperative parathyroid horm...

Article Cost/Benefit Analysis of Case Management Policies in a DUI Lab

Thank you Robert Istvan Radics and Mohamed A Hammad for your answers and valuable suggestions and links.