You will have to give them proper notice AND I am unaware of any city or state that allows you to change the lock on a residential tenant.

He wants to move further out, away from the city. 

But be sure to consult with the city for their local guidelines. 

(really) the city was growing, and the rate of unemployment was negligible.  

If you're in Frisco or any nearby Texas city, and are willing to accept an intern to mentor who'd be willing to show me the ropes, please do...At this point finding a mentor in the summer (anytime without school) would be my best card at the moment.

Do you know where I can find information on the class of a particular neighborhood in the twin cities?

You can see big differences between similar houses based on location, even within the same city, and quality or the property. 

Infill lots in the city or recreational lots in the rural areas.. either way you need to buy them at deep discount to make this work. 

The other key to this property is it has city water and sewer at the lot lines which would obviously be cheaper than well and septic + has electrical just next door. 

From the City to the courts, the police, the litigation lawyers, the inspectors, the utility companies and worst of all the tenants.