This all will effect the beam that would be needed at the new wall opening.  

I would make sure that you have enough support beams underneath it, to support the weight.

YES I said, beaming!       

Hi I am a new investor working on my second property.The house has major foundation fix, its a pier and beam.

Has it had foundation work or is it pier and beam?   

I also purchased a laser tape measure so I can verify bedroom and other measurements quickly. 

Somewhere in the fifth, sixth, seventh decade of the house's existence, this leads to the joists slightly spalling at the far ends and narrowing at the center beam.

Rehab was $17k for pier and beam foundation repair plus new exterior paint and a little minor carpentry.

YUP thats the solution and in GA most houses are post and beam so that should not be an issue finding the sewer outletI think the seller may have some issues now that this potential buyer opened up pandora's box by notifying the health department and building department.. really depends on how aggressive those departments are .. in some areas this would be a major issue some probably could give a rip. 

Helical piles, and leaving me convinced by their expertise and inclined to take action on their bid.I didn't ultimately sign off, as I had not budgeted for that much into foundation work, and have since been able to do most of the foundation slab crack demo & repair myself with some local sub-contractor help.The helical piles approach tho: drive a stake down until it hits bedrock and then neumatically "pump up" the foundation until its back to level...seems like the ultimate right approach & solution I need, before I proceed to a future phase of finishing the attic, bumping out shed dormers, and adding +1000sqft w/ +1bdrm, +1ba, & +1 wetbar/kitchennette for an STR unit.That project phase is a few mos out, and will require a structural engineer, as I'll be adding interior structure posts, a major new ridge beam, and 20' of floor-to-ceiling full-light windows & french doors facing the bay.