(We just finished a 3k sqft home with a higher framing coat) I’d be surprised if he can even get the lumber package for 80k.

You could always sand and stain them , a couple coats of gloss poly and you would be surprised . 

Welcome to the site @Mark Coates!

Quote from @Mark Coates: Whenever you install tile over concrete an uncoupling membrane must be used to isolate your tile/ grout from the possibility of a crack in the slab ruining your floor.

Yes, grow a thicker skin.

Can I:- Purchase clothes (pants, shirts, socks, coats, jackets) that I would wear for doing renovations/rehabs and write them off? 

The safest bet is to get yourself some oil based primer and a coat of paint on the interior when turning it over.

You enter into the kitchen area with little space for your coat but that's expected at 550.sqft.

What you get when you let a tenant paint is roller-marks of the wall color on the ceiling, drips and runs, patchy covering, spilled paint, silly accent walls/ too many colors, uneven lines on edges and in corners, splatters, blistering, bubbling, peeling, the wrong sheen, visible brush marks and roller strokes, trim painted the same color as the walls, electrical outlets and switches and even light fixtures, vents, cold air returns, fart fans etc. all painted when they shouldn’t be, not enough coats where paint actually should be, and terrible color choices (almost always too dark or too weird).

That means that the only thing holding it back is a tar coating where the foundation wall sits on the footing.