I would consider getting out of property management and getting into cleaning IF you think they are doing better than you . 

This ensures a clean transition of ownership and responsibility for insurance purposes.

By all means give them a note on how to use all of the appliances (eg clean out the lint trap on the drier after each load, do not use dish soap in a dishwasher, change the furnace filter regularly, etc).

They just moved out and the house needs some cleaning up.

Simple touches like fresh paint, landscaping, and clean walkways can make a big difference.Highlight Key Features: During the appraisal, point out any high-quality materials or unique features you've added.

From what I read in The Economist, these Sun Belt regions often see steady population growth which can drive healthy rent appreciation.

Which results in more wear and tear and cleaning. 

We had to pay a biohazard company over $9k for a thorough clean up.

For example, to get up-to-date property tax data you would need to scrape every county's tax data website (thousands of different websites, data formats, issues, etc...) then aggregate and clean the data.

We agreed but only after they covered cleaning costs and left the property in move-in-ready condition.