I have a couple of duplexes with that problem in that one side is neat and the other side leaves food out, never washes dishes, etc.What I also like to do is get a big bag of (I forget what kind) poison powder that I ring the outside of the unit with like a moat.

Kind of messes up the books when double rent is shown for that month and none when it is applied the last month but it all comes out in the wash!

It's better than Kilz and I wish I had known about it when I did mine. http://www.biggerpockets.com/forums/67/topics/78889-smoker-rehab-keys-to-success-with-tobacco-smoke--before-after-picshttp://www.biggerpockets.com/renewsblog/2012/11/05/getting-rid-tough-odors/I know for pet odors there are some enzyme neutralizers, you may want to get some for the sub floor under the carpet areas help with that.http://www.biggerpockets.com/forums/67/topics/74253-cat-pee-in-concreteThe biggest cheap first step is to just literally wash everything down.

He is very intent on two things. 100% renter (his rules or the highway) or sell to me 100% (my land, my money, my problems / benefits) he washes his hands.

On my last rehab I found a box that had a single "lever" which would shut off both hot and cold water to the washing machine, that's my favorite style.

My guess would be too, that when this issue is not addressed by state law, how it washes out may lean toward lenders in conservative business minded states and toward borrowers in more consumer minded liberal states, that's a guess.

Was he slurring his words?

To me, I have considered laundrymats, coin car washes, and self storage units as ideas that might not take up a lot of time. 

Scrape off whats there , go to the local self service car wash and clean it , or grab somebodys pressure washer blast it clean and put it back .

I washed the walls with a bleach cleaner and then I used Killz 2 the oil based primer on the walls, and baseboard.