There is no inherent value in Real Estate, its value is derived from the surrounding economy. 

Thank you, Kristen Freddie Mac: The business the qualifying income calculation is derived from must be >5 years old.

I do not know what they use to derive their numbers but Zillow has a 1 year forecast for price and rent.  

Without knowing how much of the value is derived from it vs. the two basement units, it's hard to tell if they are worth it.

What motivation or benefit would they derive from providing me what i ask for?

My recent endeavor of finding a real estate agent to work with to accomplish a couple of things(in which in total entails deriving data from the MLS,) has led me into contact with someone who is not an agent but has informed me that cash buyers obtained from MLS data are not including in the data from deals that were closed privately in real estate attorney offices.

I also question when it is right to derive a business plan.

The lender is not the seller, they just think they are, but without them you don't have a SS>Absolutely, making a false statement to a federally insured depository with the intention of deriving any benefit is a crime.

Or some derivative thereof.  

The amount of the line item is derived from the appraiser's experience in the local market, where observations can be made of typical owners of similar properties.