:you cannot control the cleaning agents the tenants use.Shouldn't be a concern as long as you first warn them, and have a proper security deposit.

Question:  So why the mobile app when you already have essentially the same thing through a web browser but with the added functionality of multiple tabs/pages to manage at once? 

The point is, all modifications must be ratified by all parties, full signature and date somewhere otherwise the mods are not enforceable.Your problem is, if not properly ratified, what's the next step for you - - is it worth your effort to pursue further?

The rightful Owner might be better off just having it listed, to find an Owner-occupier who will pay the proper market value.

It's hard to work up enthusiasm for going and doing an estimate -which takes a good while to do properly - for an investor with an unknown track record.

A proper presentation shows the full expense amounts under "operating expenses."

I have a great article on how to leverage your way into that first investment property and how to present it properly to the RIGHT mortgage broker, I know it works because that's what I did. 

I figured it was along those lines, but my google-fu was not working properly.

That means a proper business entity structure to insulate you from as much liability as possible in the event of a lawsuit.

What  that proper service.if there is a payment plan in place, and can the 2nd position lender request for the release?