They are a couple, and there have been multiple incidents of domestic violence, police involvement.

What are the benefits, if any, of Incorporating your REI business in Delaware as the domestic state??

You didn't mention this so may not even know it but one of the reasons that your accountant put teach of your properties is an what I am assuming is a domestic LLC is to proactively mitigate the impact of the FIRPTA Withholding.  

I don't want to be mistaken, as I am quite bullish, though realistic.Warren Buffet has said the following about the stock market:“The economy, as measured by gross domestic product, can be expected to grow at an annual rate of about 3 percent over the long term, and inflation of 2 percent would push nominal GDP growth to 5 percent, Buffett said.

Since then, most of the high-dollar markets have relied upon domestic and international migration to drive real estate prices.The developed world almost without exception has a sub-replacement birth rate.  

And have stories about those first tenants, including trying to burn the place down, writing a notice to comply letter to stop vomiting out the front door, and mediating domestic disputes.  

I took a load off and did some minor traveling domestically for a few months. 

I am a licensed managing broker and primarily only work with investors(foreign and domestic).

I am a licensed managing broker, own a property management company, and primarily only work with investors(foreign and domestic).

You also mentioned the tenant moved to a different state - this could require you to domesticate a judgment (or even sue her where she lives) in her new home state before you attempted to go after her assets or garnish wages etc.