This is one of the questions I use to think about often and have even spent TONS of hours researching trying to find that perfect zip code that was the pot of gold. Be Careful because It is also the type question with an ever changing answer and can lead to an analysis paralysis if you are waiting to invest until you find the Perfect location. Lastly I don't think that anyone can tell you the exact places that cashflow the best. ACTUALLY let me rephrase that, there probably is some techie type person who is feverishly working on a formula and computer algorithm that would figure this out. Even in that case Im sure there are little towns, and pockets of certain areas in cities across this country that give pot of gold type returns. I think it is more important to decide what you want your cashflow to be and then find and create deals that meet your criteria through creative negotiating. Create your plan and stick to it, Eventually when bought properly ALL properties cashflow great after your tenant pays down the mortgage for you! ; )