Combining your property insurance and tax strategy services (such as cost segregation) can help alleviate some of these frustrations.The most important resource for any person is time.

., being a nuisance to neighbors, use of drugs, taking in new people without consent by the landlord, changing the locks,  or modification of living spaces without permission?

I am really just looking to avoid the worst of the worst areas (anywhere with open air drug markets or active gang warfare / prolific violent crimes).

When going before public meetings with your proposals, drug, alcohol, and half way houses for former incarcerated, receive the most scrutiny.

In 36-60 months(3-5 years), you can really alleviate a lot of the issues.

Or, the actual location could be terrible (like ghetto or drug area or war zone).

This is to alleviate any added flooding your project creates for the downstream properties. 

For instance, there is currently a nursing shortage across the US, and traveling nurses help to alleviate it.

But that's me.To answer your question, I'm not in the business of recycling dirty money but I think it's pretty well known and established the the proceeds for criminality and the drug trade is invested in all sort of business, especially real estate.

That would help alleviate the 50% of take home income issue.What do long term rents look like in your area for both units?