The thing is I've never been to those areas that used to be undesirable - so there is a lot of research and learning to be done to figure out those areas.

All of this cost much less time and money than using lawyers and courts to get an undesirable tenant out.Good luck!

I’m looking at it the same way, I’m not going to bring my family to an undesirable area for their sake, and I look at reducing expenses as a positive, as for at least a first investment moving my money positively is a step forward 

If you are constantly on the move or in less than desirable areas I would be hesitant to put my Macbook Air on a moldy/dusty/undesirable counter top but I would have no problem putting my $300-500 laptop on the same counter bc they are easily replaceable just in case something happens.

Atlanta as seen phenomenal growth.BTW the suburbs which were undesirable have also tripled. 

Even the lowest priced house still needs to offer any future resident safety and this area can lead to various very undesirable legal liabilities for the owner/seller.

If he wants the building to demo and redevelop, then he can choose to let his units stay vacant (or put some tenants in - this scenario works either way) and then let the building deteriorate until the other units are undesirable for rentals and devalued for purchases.  

Whatever the occupancy is today you should plan for it to go lower in the first year if there are undesirable residents that you need to cycle out.

Therefore that’s a slow and essentially undesirable market to even think about buying in unless it’s a low income area.

However, the normal background and credit checks will almost always weed out undesirable applicants.