That extra diligence is screaming.Perhaps you should stick to promoting yourself. 

Yesterday, the landlord stated that it was their impression that we had agreed to painting not only the two rooms but extra rooms as well and now they are saying they are going to void the clause and raise the rent back to $3200, or we have to paint extra rooms not agreed upon.

However, you appear to be the type that doesnt really want to deal with some of the work or extra effort needed for those strategies.

Every unit will find a tenant you do not need to intice them with extras that do not put more money in your pocket.

Want extra help?

A 50k addition (adding an extra bath and bedroom) would likely add 75k of value to the house. 

Property Owner, you have an extra 1000 square feet with enough setback to add a 500 sqft ADU on this lot.

Builders do this a lot to add extra potential sleeping area without having more bedrooms than septic is rated for.I have seen people put beds in the loft after closing or even close in this area to make an unofficial bedroom.Just be clear in your pictures and description and you should be fine either way.

Extra income by renting and the benefits of appreciation.

So my price per hour went up and the customer was charged the extra hour of my crew and I to fix the leak.