I am reporting every one of them now as this has gone on for years and is ridiculous that people don't know how to follow the law! 

You still have to comply with all relevant laws.  

I don't know the law or eviction procedures in Saint George, Utah.

Starting from 2016 she has several things like giving false information to law enforcement officers, Shop lifting, battery and more giving false identity to law enforcement officers and then the felony for identity theft.

What rentals are not subject to fair housing law?

I think hard money lender to take this risk cannot legally charge appropriately which means the law is working against you (the law meant to protect owner occupied owners from unfair loans).I agree with @Jay Hinrichs that your best option likely is to sell on the mls.  

Can add a in-law suite for lots of value.

Do you want to keep the in-laws' house?

Any business could do this with their services and the savings would certainly justify the additional effort.But if you take advantage of the new law, wouldn't the renter do the same?

Duplex can always add additional units via the ADU laws. 8) Related to number 1, purchasing a property with an existing ADU is cheaper than buying a property and adding an ADU.