Managing from out of country

[Avi Garg]

Lately I have been thinking about buying few rentals (~20) and then eventually retire in a country with a low cost of living. Its all up in the air for now. I do have a question. Apart from having property managers, how does one go about making sure all the mails get to you? How would you know about the property taxes (mine come in mail for my primary residence) and when to pay? Insurance can be done online. I heard about mail forwarding service but not sure if it works. 

Has anyone done this successfully? Would love to hear feedback