Fingers crossed the keys are dropped off and there is no damage.

Usually, when one zone does not shut off we find that the problem is either the thermostat is wired wrong, or there is a short, crossed and bare wire inside the wall at the thermostat location.

You have learned that public data is often less than accurate if you find that Zillow or whoever's data is more accurate you can make that your new data source or cross reference the lists

After serving 5 years in the US Marine Corps, I will be transitioning out into the civilian world in a few months.

Does anyone have a good referral of a cross-borderaccountant?

Maybe You should just wait some more pay her bills and cross your fingers the tenant will feel guilty and will eventually honor her agreements . ... or you can choose to run this like a business and hand this entitled idiot an eviction notice along with a hefty late fee .

I did find a hard money lender that can cross collateralize and refinance into longer term loans to fit my buy and hold strategy. 

One example relating to real estate would be wholesalers who cross the line some states establish about being a real estate Broker to represent one or more parties in a real estate transaction.  

The Encroachment issue is the pool wires are crossing city lines underground, which would take x amount of time to fix as well as x amount of money.

You could/should not re-cross that line back to being an investor.