Highly desirable neighborhoods with small 2/1's.  

The mortgage amount is less than 20K, homes in that neighborhood are around 120k on the low end, 160 on the high end.

Drive around neighborhoods to find vacant houses.

Would it be a good idea to place signs in higher end neighborhoods?

I would just avoid bad neighborhoods.

You have to ask yourself at some point (in 2% neighborhoods) if housing prices are so low and renting is so much more expensive than owning, then why wouldn't everybody own in those neighborhoods?

Is it in a neighborhood or along a highway somewhere?

In regards to the fence, the neighbors are nice, there haven't been any problems in the neighborhood, but the houses immediately next to this house are in need of repairs, there are some loud obnoxious drunks in a neighboring house, and a few blocks down in one direction there is a public housing project.

Moral of the story: I got lucky this time - but when driving for dollars - especially in sketchy neighborhoods  - maybe it's best to stay in the car.

A 4 unit in the wrong neighborhood may never sell.