The deal might look very good on paper but there are too many variables (gang, criminal activity, drugs etc.) and your property management cost will be much higher, as well as repairs and such.

If Google translation from English to Spanish is of similar quality to its translations from English to French {or French to English}, you are not doing yourself any real justice with the advertisement in Spanish.The idea of placing an advertisement in Spanish is a good one, but find someone you know who's mother tongue is Spanish or who is fluent and cabable writing in Spanish to help you pen the advertisement ... or at least clean-up Google's translation ;-)

Druggies, gangbangers, or scumbags OF ANY RACE will hurt property values, alienate the neighbors, and fill the property with criminals (exactly as your father said).

Johnson practiced civil and criminal law in DeKalb County for twenty-seven (27) years.

Furthermore, I have EXTENSIVE experience dealing with low income tenants; druggies; and criminals (something you indicate in your post that you do not).

I will be contacting a lawyer when I need one and so far of the 2 dozen or so letters I have received none involved legal action beyond the normal Landlord tenant BS.I am only discussing normal landlord tenant issues and feel that lawyers that try to draw landlord tenant issues beyond the realm of the landlord tenant resolution framework are not doing their clients any justice. 

As in the aforementioned dog for the girl with cancer- let her have the damned dog, because it will cost you a lot more to fight than to "be reasonable," because you WILL lose, and the fight itself costly...do you have the Department of Justice fighting your case for free? 

It also does criminal and eviction check (though I still search the county court records for their name.

Soliciting funds from investors in some cases may trigger both state and federal securities law and criminal charges for securities fraud if they want to get technical.

I would move as swiftly as the authorities can accommodate - both civilly and criminally.