Financially this deal makes sense; however, I am concerned with the safety aspect… I must live there for a year since I am looking for an FHA loan.There are areas close by that i know can have criminal activity but I am uncertain about this specific area (1-2 mile radius).

You could go after her on a couple fronts , small claims for breach of contract  ,criminal prosecution for bad check , and contact the new landlord as a reference after the fact .

This is what I'm referring to --> "Justice for Renters Act" This is coming up on this year's November ballot for the entire state. 

I also have updated my application with a section where they can address variances to my "typical qualifications," where they can explain things like an old criminal background record (still states absolutely no evictions) or a divorce that wrecked their credit score. 

We screen heavy and our tenants usually make great income, no criminal history’s, and are great tenants.

This individual not only disrupted the peace of my other tenants but also engaged in criminal activities, including domestic violence and terrorizing children in the building.

However, I did notice that their criminal reports occasionally miss information.  

I also used to ask more about criminal history, before that became protected.

These are not sophisticated scams executed by criminal masterminds.

That said, I know a few MHP operators that make some pretty tremendous money on the trailers, mostly by renting to people who need to pay in cash and have someone not ask a lot of questions - illegal/undocumented immigrants, transients, probably some criminals for sure, sometimes people (mostly women) hiding from domestic abusers, etc.