How extensive of a rehab are you doing?

@Zach Jacob, I'm not an expert on the subject, but have talked extensively with others about this very thing.

She moved out in March and we have had to do extensive work to get it ready to sell.

If they are not gone in 2 days, then your seller may be in default and you would follow whatever recourse you have in the contract or you'd have to agree to some extension if the seller has time before foreclosure. 

I've also seen people literally run an extension cord from their house with no power, through a window, and to a neighbor's house that did have power. 

Actual service animals require extensive & specialized training to provide a very specific service to their owner.

I did an extensive research and understand the concept of LLC as well as pros and cons of having it.

This would seem a logical extension of that to educate and counsel sellers who are vulnerable to being taken advantage of.

There is also a pretty extensive list here on BP

Extensive work needed on a water damaged house.