LOL..Did you make this illustration?
It'd be have to be a lot of biogas and a lot of cows for a profitable farm. On top of that you need significant investments for the mining gear itself.
You have the land so space won't be an issue depending on how accessible is broadband in your area. Yet, these are mostly pie-in-the-sky ideas. The devil is in the details and so are the complications.
It has been almost two years since OP posted this idea and that "detailed" illustration of the masterplan. I wonder what has become of this idea in the times of "yield farms" on DeFi. If anything, the OP can at least claim ownership to the idea of a cryptocurrency farm which are ubiquitous now in the times of DeFi.
This concept alone do shows that you would need big funding for this one and it is true that you would really be needing lots of cows considering that biogas and fertilizer would be the main key and plus those asic
miners which we do know that this isnt something cheap that you could ignore plus on how many miners you would tend to build off to have some significant crypto earning out of this idea?
Close to impossible but it could be done but this would require big investment or funding.