It makes the property pop from the street.

You can ask (if it's not obvious) what the nature of the disability is and what task(s) the dog has been trained to perform.

If the numbers work, the numbers work.

Would it be a good idea to take a deposit to secure the deal until the rule clears?

I'd say if you are looking for commercial real estate wherein the purchase bought the property in a corporation then PS is not the best place for lead generation and skip tracing. 

Sounds like she has a loan on the property still so the only way to get the deed into your name is to have the loan paid off like normal. unless she has an assumable FHA loan. 

Focus on absentee owners and start with the ones who live the farthest away and only own one property in the area since they have the least use for the property.You can also drive for dollars, looking for anomalies of disrepair and then look them up in the tax records and use a site like Spokeo to do cheap skip tracing.

If the owner submits a completed application before the servicer starts the state foreclosure process, the servicer can't foreclose until the following occurs:the borrower doesn’t qualify for, or rejects, the lender’s loss mitigation options, orthe borrower accepts a loss mitigation offer but fails to fulfill its requirements."

Hopefully, you've followed all of this so far.

Is this the case for all mobile devices or am I missing something?