Since it sounds like you already have duct work in place for both apartments, you can likely just have the existing system support the larger of the two apartments  and purchase another HVAC unit for the other apartment.  

Certain people have only hoped that Zillow has made enough bad purchases to undo their existence.

For all existing tenants I think the wisest thing to do is ask them to pay what they can.

Only difference may be adding a lender policy to an existing title insurance policy (I always recommend getting title insurance).  

Dominoes pizza went with the tech company that happens to deliver pizzas and if you look at the Zillow CEO, his background and their growing notability/market presence,you could see a foreseeable leader taking Zillow to a 21st century route that I couldn’t put in words to comprehend but it exists.

Just make sure your numbers include very conservative estimates and the deal works even with low rents AND high economic vacancies.Also, when thinking about 15% rent bumps – that kind of increase will almost always mean the existing tenants will leave.

This is the low end of a hands off ADU other than converting existing living space.The more sophisticated value add people are still leveraging non-optimized zoning. 

Honestly, my question is pretty basic about exempt property types, They do exist, duplexes, when mom and pops own few properties and maybe a few others.

I need about $300,000 to finish the asphalt, landscape and last unit.

We would be buying existing (performing and non-performing notes as well as creating notes using private financing.