I chose light colors to open it up more..

@Scott MacCan you give more color on your friend's asset freeze ?  

They have expertise in selecting furniture, decor, colors, and layouts that complement the property's style and appeal to potential guests.Optimized Space Utilization: Designers can maximize the functionality of your rental property, ensuring that every space is utilized effectively.

Does anyone have a color suggestions?

How do you find and compensate a good designer for overall material choices and color selections? 

What color do you think goes well with the repose gray of the walls?

So, whatever it is... eat the same meal, listen to the same song, wear the same color, etc.

I have had mostly great guests, but the few that I've had that were terribly messy (much of what you describe but also smearing pizza toppings on the floor, having an easter egg hunt (I found some of the eggs) with chocolate in fabric and pink maybe egg coloring staining two sets of sheets) and yet were given 5 star reviews from prior hosts.  

I made an Excel spreadsheet and color code the ones that are higher in the red or orange colors, and low balances in green.

Vibrant colors, wallpaper, etc.