I'd use Hardi coated with dragon skin or similar...some kind of real vapor barrier....

On a primary turn,  I want all the trim sanded, BIN primer coat for adhesion, 2 coats of KILZ oil-based, sanded to 220, then two coats of Rustoleum thinned with Penetrol, also sanded to 220.

Maybe apply small cosmetic changes inside the house such as fresh coat of paint?

@Brooke O'BryanIn my basement, I did a coated concrete finish.

#6 other tips:A) tips of things to watch out for: the way a tenant keeps their car interior may very well indicate how they'll keep their home (your investment)B) over-engineering your rentals during the rehab portion with thicker drywall, tile vs carpet, and Quartz counters (in higher ends) to withstand children or student abuses.I'm pretty sure both of those are from BP podcast #48 with Darren Sager.  

The quote was as follows:Repaint all ceiling and walls 2 coats and paint trim. - $2,824Keep in mind, I am paying materials so this is just for the labor. 

I look for thicker the better.

You may not need 2 coats.

Then use a coat of bonding primer to make sure the paint adheres. 

I had to redo all window, door, and baseboard trim because drywall was thicker than the wood paneling.