Does anyone have any other tips and tricks for helping out the appraisal process so I can get the best out of the situation. also what what other things can I put in the folder to give him or what you've done in the past?

She doesn't care, why should i. 

Marketing, screening, collecting rent, unpaid rent, maintenance, capex, insurance, lawn care, vacancies, turnover costs, inspections, and so much more. 

There are cheaper one’s in D/F areas but I would be careful as those can create a laundry list of additional issues.

Usually, tenants are receptive to the idea but I also wonder if tenants with a higher credit score care less about this feature than ones with a lower credit score who are actively working to rebuild their credit?

You have to be very careful in who you listen to.

AI tip 2: a friend of mine wrote an app (beta) for landlords to market themselves on a regular basis by soliciting reviews from tenants.

You could post photos of a similar asethetic, but be very careful and make it very clear these are placeholder photos. 

Take care of your properties and follow up with issues.

Who cares about lifetime interest costs, except to the extent you can easily lower them (refinance to a lower interest rate) to increase your cashflow.