But unless the OP's unit is undesirable or has issues with the neighbors, the tenant won't be shopping around.

There were several undesirable tenants so we worked them out over the course of the year. 

@Ryan Fagan yes I plan on staying within three blocks of the riverfront ,anything close to the riverline or after in my opinion are undesirable. 

Some people will be better at planning than execution and vice versa.You will need to have a good balance between planning and execution.You can have the best plans in the world, but if you don't execute on them, then they are worth nothing.Or on the other hand, you can be great at taking action, but if you don't plan well and know your destination, then you can end up at a very undesirable place.

Even in the undesirable areas of Denver I can't picture finding a $100K property that would rent for $2,000/mo.  

She is a single Mom who has had an undesirable "boyfriend" hanging around for several months. 

If the occupants are undesirable, I'll certainly have a friend with me.

Expanding on the @Shaun Reilly  post, in NC you can provide some peripheral real estate services (but not the actual leasing) and not need a broker's license.

While there are many other factors for making an area "highly desirable" or "undesirable" generally you should know the trends of things that matter to the tenants such as: schools, crime, local economic developments, companies relocating in or out of your area.According to latest stats, it appears home ownership is at lowest levels in way long, hence you can assume (pending the fannie mae 3% downpayment upcoming thing) that lots will rent.

On the positive side, all of the interior walls are concrete block which limits peripheral damage when shooting occur inside the buildings or tenants set their units on fire.