I would have the system pressure tested before you decide to start repairing.We bought a duplex where the bank had let the oil run out and the heating system froze.  

Once you get past the initial sniff test they'll want more information.  

BP members, Hello, now you all can watch this Stress Test of the screwed up Citizens Home Owners Insurance that we were tricked into.

Quickly realizing that it is very expensive to live out here, so it challenging to find properties that would pass the rule of thumb tests (50%, 2% rules, etc).

This can truly be put to the test when it comes to counter offers and negotiating repair items after an inspection.  

Hi, @Ben Roberts.I agree with @Curt Davis, @Alex Craig, and @Dean Letfus.Your downside seems to be protected in many ways.I don't know if you've bought your first buy & hold yet, but this sounds like a good way to test the waters.  

Some casual photos can hardly pass sniff test imho.

I have finished all of the courses and tests to become a licensed real estate agent but have not currently found a broker.The last thing I wanted to mention is that I hope to own 10-20 income producing properties in the next 10 years.

I have it setup and tested on my computer desk at my house now.

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?)