That was a few years ago, but i share the story to help shift the mindset to possibilities and away from scarcity. 

I might be not quite understanding the question - if I miss it, let me know.In terms of volume, there probably are more upper/lower duplexes than side by sides in total, but that gradually shifts - it's rare for an upper/lower duplex to be built nowadays.There is fierce competition for side by side duplexes which drives the prices up in the Green Bay (and surrounding ) markets - primarily caused by owner occupants. 

I work 10 hour shifts and an renovating a new rental on my days off.

hang in there, the market is in a delicate place, but the market can shift from sellers to buyers too. it's been tough for buyers in this market, and depending on which towns you're focus on, the low inventory can make it almost impossible, but don't lose hope!

The graph shows the shift, not the cost. 

As for now I'm going to shift my focus on other areas.And thanks to all participating in this topic.

Many of the neighborhoods have shifted in the lower areas, so I wouldn't really rely on that too much. 

I'm interested in a gradual shift.

I shifted to buying condo in the north loop...totally different than my duplexes.

The influx of people into Houston is probably slower in this oil environment so there may be a market correction here and there, but I don't see a 2006 sized bubble being formed - just a shift back to "normal" prices due to lower buyer demand, even-ing the playing field between buyers and sellers.