It seems fair, but definitely comes down to the debt-service coverage ratio, FICO, price, etc. 

His team apparently hires the coffee farmers and provides them a good job, fair wages, health and pension benefits, etc.

Norris Lake is proving to be a great market.

Atlanta is becoming an expensive market, and I don't see that slowing down or reversing soon.

That is a fairly complex exchange that will be difficult to execute.  

Quote from @Gregory Martin: I don't know what's allowed in your market.

I'd love to try this tool, we analyze every lot in our market under 25k in Columbus Ohio and this would be very useful. we need frontage, depth, acreage, price per acre, I can send you my current template and maybe you could modify it what do you think? 

A neighboring property, similar to my current rental property, is now on the market at the same price I paid two years ago, with comparable rent.

I'd start with local banks/CU's that are close to the property you're looking at especially if you're local to the market also. 

I am not sure how the owner occupancy requirement of the JADU impacts value, but is will impact value as there are many RE investors who do not want to owner occupy.You should be able to determine the value by calculating NOI and knowing the market cap rate.