In sunset hills Missouri they do require the home owner or representative have a mailing adddress in the city  

Turnovers, vacancy and maintenance will kill you in those markets and it's FAR from the "passive" income people tell you they are getting when they are trying to sell you their junk deal. 

Additionally, you blanket a neighborhood you are interested in with door knocking, direct mail campaigns.  

It increases your junk spam.

Direct mail.

Then you ask them to email you or mail you something in writing saying just that. 

You will have access to millions of properties, criteria filters, list building, list tagging, skip tracing , direct mailing, and emailing, and the list goes on and on.

They have been buying Greek junk bonds lately along with all kinds of other oddball and unique investments.

Rather than call and inform me they were going to trigger the default rate (5 basis points higher), I learned through a mailing.

Casting a large net by utilizing wholesalers, MLS, direct relationships with agents to get deals BEFORE they hit the MLS, driving for dollars/door knocking, direct mail, etc. are all great avenues if done correctly.Knowing how to calculate the ARV and rehab costs is also essential to identifying a good deal and that goes with any area.