Is it settling or the foundation is having issues(walls or main beam)? 

Another way to determine if it is a bearing wall is to see if there is a beam line in the crawlspace. 

There also is visible fungus on the beams and evidence of past termite infestation and subsequent treatment but no evidence of active infestation. 

Eg, base plate, pier and beam, p-trap, city supply, shingles, etc2. what the roles of the following people are as well as what their motivations are: lender, appraiser, inspector, realtor, wholeseller, general contractor, city, sub-contractor, buyer, seller3.

I use Magicplan with a Bluetooth laser measure to walk-though a pre-flipped property and envision what the finished project could look like while iteratively changing sizes and positioning.

The #1 most important LASER FOCUS need be on how you buy, full stop. 

(no luck) We show up the day before closing and the contractor has ripped off the back of the porch to "repair" a beam.

Has wood beam ceilings and finished wood plank ceilings in the kitchen.

Finding the buyer could also mean the price point needs to attract as well, but at $330 a ft I wonder why I am not in tractor beam range of offers.  

Another way to determine if it is a bearing wall is to see if there is a beam line in the crawlspace.