Supose a plumber lives in Riverdale CA and wants to rank highly for San Diego CA. His physical address is in Riverdale so that is easy to rank for. Is it nearly impossible to compete with other businesses with a San Diego address in San Diego? I've heard of using PO boxes and virtual offices but feel like these methods are old news. What is the proper ethical way to rank in a city that you serve and might be just a few miles down the road even though your address lists a different city?