OK off soap box  LOL 

A 2% cap on a $1M property in CA still results in a $20,000 increase in assessed value.

I reglazed a rental about 8 years ago and it's held up decently, but the soap dishes are back to pink (yes, it was pink!) 

Just get the wash cloth and soap wet. 

Leave instructions on how it is used (ie no dish soap) and a small box of dishwasher detergent or some dishwasher pods, so they can see what to use.

One rain cleans the panels, they should never have "special soap" on them and you can turn a hose on them yourself in the morning or at night. 

We use Murphy's Oil Soap first to clean floors, let dry then apply Rejuvenate. 

Obviously, you need to factor in utilities as well as any disposable (soap, paper towels, toilet paper, etc) supplies you are going to supply.  

We even do little hotel amenities like travel soaps and snacks on the night stand.

If you need other people's money then a 2% cash back card isn't the answer.Let's step down of the moral soap box for a second and not make so many assumption about the person you are addressing.Many of us, like yourself, are in cash positive position and do not "need" other peoples money, but that does not mean you should not use other peoples money if the cost to do so is less than the opportunity costs to use your own capital.