Clean it up a bit to get most bang for the buck add ons and preventative damage items like water leaks.

Could do I a lot less to get lower rents (for example an upgrade may be $10-$15k where a bare minimum repairs and cleaning may only be $1-2k).

I would have to agree with @Simon W.If I took over, or had a client ask me to clean their books, first thing I do is make the Balance Sheet crisp and clean.

My four adult children are out of the house; so, below are goals for our 11 year old and me.Read 15 minutes per day and log it.Set limit on daily electronic use.Clean up after himself (toys, push chair in, dishes, clean bedroom, clean car).He plays sports and has a few tough baseball goals that he works with me on (inside/out swing, pitching mechanics, 3B fielding). 

This helps immensely to get sheets and towels clean.

The place actually looks nice and clean. 

Ergo I do all the cooking and cleaning  LOL It doesn't hurt that your wife has a client (you) that gives her all his new builds to sell, lol. 

This was an Oct 15th acquisition and took about 2 months to clean out and repair/rehab. 

This person will most likely always pay on time and their is a higher likelihood they are clean which will mean in the end of their lease you can lease it to the next person while theyvare there and the deposit will cover the small charges. 

Also Airbnb does prioritize things like looser cancellation policies, instant book, in line with market cleaning fees, etc.