She's already demonstrated no integrity and will bleed you as long as she can.

The law states we must consider applicants based on the order in which they were received, and we want to do right by tenants by refunding their app fee if they were not screened.Option 1: Set up an online app using FormStack or other secure form with SSL and data stored with 256-bit encryption, and on-form payment integrated through a processor such as Stripe.

I have the firm belief that if you are doing the right thing and treating people right and acting with honesty and integrity, then the right thing will happen.

Housekeeping and living habits are an integral part of the ability of mold to grow.

One of these and a cloud storage platform should suffice and you can integrate the two

This is probably the easiest solution but since we don't control it directly, may not be the best to integrate with our system. 2.

But as a real person with integrity, I don't see how a model of nickel and dining an owner will result in a long term relationship that is profitable to both parties. 

Landlords should have the integrity to tell their tenant who they are.

Also, is there a point where it's up to the tenants to solve their own problems and how do you draw that line--eg if there's noise or loud music in the neighborhood or other quality of life issues that don't apply to the physical integrity and function of the property.

That would shake me certainly.Draft that nice letter, honor your suggested option of first option if you want to sell, (integrity matters whether in writing or not), and if you decide to move back in to your home prepare yourself for a few dinged walls and stained floors!