It is a single family, 3 bed, 1 bath, Cape Cod style home with 1372 sq ft of living area, a 2 car detached garage, an unfinished basement, on a corner lot.

Duplex itself varies in styles as well.

There are lots of nice resort-style condo communities that welcome renters in that range, though.

I simply reposted his outstanding analysis, written in John's trademark soft and politically correct style. ;)

The biggest issue with window units is that they can leak condensation indoors.

Especially if there is a good in door out door flow at ground level.It would be smart to lay a good carpet and underlay on the upstairs floor to minimise noise.  

My wife and I just purchased our 2-flat (to owner occupy) in Jefferson Park using this style of loan. 

Look who the buyer/sellers are and you will be able to find out quickly if they run a syndication style business. 

My properties are mostly SF Houses & Townhouses or Townhouse-Style Duplexes, so no properties where one tenant's ceiling is another's floor.

The main thing with real estate investment, from my limited perspective, would be to find the niche that best suits your investment style and personality and learn everything about that niche and do it as well as possible while continuing to learn and grow both your business and career.