There is no need to go to undesirable areas to get cashflow.

You can only sell D/C- properties to other D/C- investors.thank you Charles, are C areas considered undesirable, high crime areas ?  

It may be possible, but you'll most likely find homes in undesirable areas that are difficult to rent (ie extremely windy areas north of town). 

After years of dealing with undesirable tenants for so long, and because of the outrageous increase in property tax here in Texas, they are now considering selling to ease into retirement. 

A move in special in my opinion might be a good option if you are trying to quickly lease up an entire apartment or multi-family building, but I think it is unnecessary for leasing SFR's unless they are in a poor school district or an undesirable area.

I cannot obtain variances since the issues were self imposed by the previous owners.If I demo the additions, it would bring the home back to a 2/1 which is highly undesirable in this neighborhood.

Now you see how flips are sometimes "undesirable" to many homebuyers. 

The suburbs seem much more landlord friendly and averse to accepting any of the undesirable spillover from the city's policies. 

Here is the situation:  Market rents, if the units are in good condition with relatively new finishes is $1300, except there is some illegal dumping in an empty lot across the street that makes the block undesirable for people paying the highest market rents (that's another story . . . )  The two units are in different condition; one just needs some minor repairs (a family of 3 people who keep the place clean, and the dad has previously done maintenance as a job, and English is the family's second language), but the other needs a new kitchen and bathroom (a family of 5 with a dog, where no one is handy).  

That is half a year that is undesired from my perspective.