If left unchecked the wall could eventually collapse inward with undesirable to catastrophic results.It may be possible to brace the existing wall to halt movement and/or support the building to allow that section of the foundation to be repaired/replaced.  

There are places in the city that were very undesirable 2 years ago that are up-and-coming or hot right now.

I get that logic, but if I am in Arizona wanting to buy in Arizona wouldn't that mean I was sending only to people out of state making a "kitchen table" meeting geographically undesirable?

What are some of the bigger "red flags" or issues/downsides to purchasing these Nore (other than the obvious of borrower's poor credit, undesirable neighborhood, poor payment history, borrower's initial low down payment/equity, etc)?

In other areas of the US a house that is more than 20 years old may be considered outdated and undesireable.

That person and I had a peripherally friendly relationship, and when it came time to sell the house, he called me first.  

That will help tremendously and minimize the riff-raff and undesirable troublemakers.$1400-$1600/mo seems to be the sweet spot for similar rentals in that region.

Milwaukee landlords, I'm wondering what you think of a 2/2 duplex I saw with what I think is an undesirable floor plan.The typical 2-bed duplex in Milwaukee I am used to seeing it with a hallway with a bedroom at each end, and a bathroom in the middle.But this particular duplex has the following layout - one bedroom off the LR, which is fine. 

You only have to look at this thread to see how many people are stopped in their tracks by this issue.The only issue is to get the property at a price that reflects it's undesirability with all the utilities as one.

At this rate, I wouldn't be able to finance another property for a few years, which is also undesirable.