Very good lighting inside&out (on a timer), plus motion activated lights as much as possible/appropriate (they make super bright LARGE led ones, even solar now so don't need to be hard wired). 

use stuff like these for 10 days https://www.amazon.com/Diffuser-Homeweeks-Colorful-Essential...

Maybe repaint their interior in their favorite color.

- Motion trigger activation, and I’d prefer if it would record longer than 30 seconds when triggered - The ability to download and store videos - Real time notification on my phone when camera is triggered - similar to my Ring doorbell I use at my home- Cameras record both video and AUDIO- My ability to talk to people through the cameras would be a bonus - Night vision for outside cameras a bonus- Ability to remotely swivel horizontally - and vertically?

Baahhh, Seri tell me what color sky is I can't be troubled to look up for myself.

I think it's a slow motion train wreck as it stands.

I conducted an inspection of the property and found multiple big colorful stains on the carpet.

This property is ugly as-is, and some people truly get upset by an ugly house when they're renting it shorter term, as though it's some reflection on them personally.Good news is that you can paint those ugly rocks and brick the same color, and make it look WAY better. 

Color me confused.

Or maybe you completely go out of the box and do a bright colored plant theme.