I'd personally never invest in real estate for a 10% return knowing that this is the long term average return of the stock market, which is less risky much more liquid and has more potential upside if you pick stocks yourself.As for the political, criminal and economical state of these countries, it's much better than you think.

Last I checked it was to illegal to discriminate on the grounds of an eviction and most criminal activity.  

And if he’s scaring off tenants and making your life hell in the meantime you might have some sort of case of opportunity cost.I would also advise talking to a lawyer sooner rather than later because if it does come to a legal battle the first person to file has a little bit of a psychological upper hand in the court system, or so I’ve been told- especially when it comes to disputes rather than overtly criminal behavior.Also I’m sorry for your loss.

So for instance if the tenant needs to come up with $200 per month in rent and your minimum income requirement is 3x the monthly rent than confirm they make $600 take home per month just like you would with any other applicant.Lastly, you can have a minimum credit score requirement and a lack of criminal background minimum requirement just like you would with any other potential applicant.