Additionally, close to a college is good...but is also labor intensive and you will need money to fix things. 

If anyone has any information on where we can do some research to find out which neighborhoods are "hot" or moving pretty quickly, we would really appreciate any advice!

While most Net Zero buildings are energy efficient, perhaps even highly so in comparison to minimum building code requirements, there is nothing requiring them to anywhere new the efficiency level of a Passivhaus   .... this is why you will see odd things like warehouses with large rooftop solar installations being able to claim Net Zero.On the other hand, Passivhaus sets three metrics which a building must meet to be certified as Passivhaus compliant:  The building must have a heating and cooling demand of not more than 15 kWh/m2 (4,755 BTU/sq ft; 5.017 MJ/sq ft) per year  and a peak heat load of 10 W/m2.Total primary energy consumption (energy for heating, hot water and electricity) must not be more than 120 kWh/m2 (38,040 BTU/sq ft; 40.13 MJ/sq ft) per yearThe building must not leak more air than 0.6 times the house volume per hour (n50 ≤ 0.6 / hour) at 50 Pa (0.0073 psi) as tested by a blower door.Ironically, the research and pilot projects which fuelled what eventually became the Passivhaus standard was carried out in Saskatchewan as a National Research Council (NRC) project in the 1970s (the house is still in use today) and a similar project (Minnesota?)

An area has to be extremely hot for building new investment property to make money.  

Good chances are you'll be fine if you give them a notice to vacate, but what you may think is totally rational could increase your liability and land you in hot water if the tenant decides to lawyer up.

SFR are so hot right now that I am telling my investors to look for deals but they're few and far between right now.  

Hello @Curt Riffel , well because real estate is so hot here, you have many people that want to get in but don't know what they're doing and they decide to start with flipping.

And you generate the significant tax deductions and cash flow that allow you to ratchet your investing almost as quickly as the work intensive flip model.  

Now, you didn't mention CAPEX (expensive items such as roof, HVAC, hot water heater, etc.). 

You know how hot rentals are in SD so you won't have a problem renting.