That way they feel like they are getting their money's worth.Adding ceiling fans, repainting a room or two, changing the countertops in the kitchen, changing the sink in bathroom will make it harder for them to leave.Plus if they do decide to leave, you have already started the process to get the unit ready for the next tenant.  

The house itself is charming but could use a repaint.

They hide dirt much better and need repainting less often.

They're cheap and can be repainted with white appliance paint by Rust Oleum.

I moved in and immediately replaced all of the carpet flooring in the house with engineered hardwood; I re-painted the entire interior; I replaced all kitchen appliances with new ones that I found at a discount at an outlet/scratch and dent; and replaced the water heater.

Cut out the bottom 4 feet of drywall (you can see the seam in your picture, look at the area just above the torn paper in the purple paint), put up new 4x8/4x12 sheets of drywall, tape, mud, sand and repaint;2.

I understand the damage was extensive, but *big whistle* that's pretty steep for repairs and refinishing, especially when considering it was not a 'one-off' and has been consistent with all your properties.Most I have ever paid was around 2k, and while the property was not demo'd, it was banged up pretty good by teens who broke in while it was vacant and threw a party and 'vandalised' it, requiring patches, replaced doors, new carpet, repaired cabinets, repainted walls, etc (this was in Columbia MO)

All of the Plumbing lines were busted and needed to be replaced, tuckpointing was needed, an entire interior repaint was needed as well.

We almost always repaint our apartments when we turn them over so the extra damage is holes in the walls, damaged doors, pet damage, missing fixtures, water damage, damaged cabinets, etc. 

Say it costs $1500 to repaint and clean a unit .