I have my own lease and handle it with a paper document, that way I can walk the tenants through the property on move-in day with a move-in checklist and a short tone-setting discussion of what I expect from anyone who rents one of my properties.

This link is the latest guidance and includes a process you can follow to screen and approve service or support animals: https://www.hud.gov/sites/dfiles/PA/documents/HUDAsstAnimalN...4.

Also, you have all the documentation of the updates.

Verifying last 2 years of rental history very important!

@Charles Perkins is absolutely correct about "collecting all receipts, properly tracking all income and expenses and your basis for all assets properly documented and recorded."

Many DSCR programs require an investor to have a mortgage history- there are some DSCR mortgage programs that will work with investors who are renting- some refer to them as first time home buyers (FTHBs)- DSCR loans are only for investment properties where the owner isn't living there.

If I would require some documentation from the city, would that trigger them to do the property lookup?

Our focus has been on documenting our strategy, creating work instructions for all of our processes, holding true to our buy box, and not overleveraging ourselves. 

It’ll save you headaches later if she tries to escalate things.Document Everything: Take pictures, write down the history of your interactions etcOffer a Transition Plan: Just like my client, I’d recomend offering her a temporary storage option nearby, or even a small rent discount, to show you’re not trying to kick her out - just keeping the property safe and up to code.

If it wasn't for the character and history it wouldn't be worth it.