I will be using a 30 fixed rate mortgage and putting 20% down.After I close, I will be doing the following renovations: Refinish/stain the original hardwood floors which appear to be in pretty good shape; new interior trim; renovate full bath (tile floors, tile shower surround, new toilet, new vanity, towel racks, etc); paint interior; new interior light fixtures; minor landscaping; new interior doors; new closet shelving.  

I painted the trim around the windows because I was painting the whole exterior while in-between tenants.

@J Scott, Realtor had an ARV of 162,000, my analysis was 150k, worst case scenario is a similar house just sold around the corner with a lower level of trim at 129,000.  

I supply the washer and dryer there, because the doorways are so narrow that the doors have to be removed, AND the doorstop trim has to be removed, to just barely squeeze those appliances through the doorway; and the choice of washer and dryer was constrained to models that had small enough dimensions to fit. 

I cut a few corners by not replacing window trim etc but the rest of my flip is all new items. 

As far as actual prices go, from my experience I'd say it depends on the level of trim but assuming the exterior and mechanicals are OK; I'd say 25-60 for a ~1300 sqft SFR...

. ($4000)2.The kitchen, bath, and bedroom has missing trim, floor cover is old.  ($4000)3.Second floor hall has missing ceiling, with plaster fallen. ($750)4.The stairs kick plates need painting, the upstairs bathroom needs scrape and painting as there is peeling. ($1000)5.The furnace needs to be inspected for safety and if it is adequate.

You may have a very clean tenant but they may have painted one of the rooms blue with brown trim (Yes, I have had a tenant do that to one of my apartments).

Cover it up, the wall is stabilized, in most cases it is considered a permanent fix, most contractors use I-beams with a 3 1/2" web so a 2X4 can sit next to it, I have installed beams, and have much experience with these, as long as there doesnt appear to have additional movement, (sometimes stabilized walls will move the house around in severe situations)then I see no issue with putting rock over it, just use Basement board, dont have the drywall contact the concrete floor, leave a gap, and cover it with trim, the rock will wick up any moisture.

Trim will remain while.