They know if someone lives there and times get tough they tend to fight to make it work.

It doesn't sound like it's worth while to go after her for 1 day of rent or fight her on the security deposit unless you don't value your time much.

Disclosures can be something you can fight (legally) with your attorney.  

I understand there is a lot of history and character in each house which attracts buyers and its doing the neighborhood good but just expect to fight your way through the whole rehab.

Tenants can make your plans go to pieces if they decide they have been treated unfairly by either fighting it or doing damage to the property.

Fortunately, there are those in the industry that will fight FRAUDS AND SCAMMERS and help protect the public from these types. 

I think to make it easier, if you asked for a seller credit and then used them to double end the deal you would avoid a fight or sour feelings.

I really don't think it matters as u are more fighting for price per night.

As a side note, I fully intended to use a property manager from the get go, and I discovered they usually charge around 10% assuming that is fair enough to not fight over, even if I only make $100 a month (profit) then I would consider it a victory, albet a small one.

However, as @Brian Burke has stated in his post, sellers will sometimes have multiple brokers fighting for their listing.