pros and cons to fix and flip a slab foundation house to a pier and beam house?

Two weeks after the house was closed he texted me about the issue in one of the bath room vent and bowing of plumbing line (Foundation is pier and beam).

Dovetail drawers, wood gussets and beams reinforcing the lowers. 

Back then they used plaster for the walls so I have had to re-drywall the entire interior, all four floors, install new electrical wires throughout along with a new box, all new plumbing lines, and support beams in the basement to correct the uneven floor.

Becoming so laser focused on REI and getting my hands on every source of material I can to learn.

When they re-lift the beams back to straight, it a lot of time will damage floors or walls above.

I think this is going to be a great starter deal for us... but the back bedroom has a beam that dips below the level of the ceiling. 

Technically, that’s no longer a renewal - that’s a renegotiation of the contract and had we known we would’ve accepted another offer.The whole thing is bizarre, I have a sense they have an agenda they’re not disclosing because at this price range, with kids enrolled in great private schools nearby, our experience has been the opposite - families wanting to lock the house down at their sole option for x years at x price.The arguments the tenants presented are very bizarre as well (what if lightning strikes the house, or I decide to adopt 4 children and need more rooms, what if I need laser surgery only available in Europe).

The depth worries me, if it's been happening in the same place(s) for years it can certainly be deep and hit the beams below.

So, identify your business plan so you can attack it better and with a proper laser focus.