Of Russian-Jewish descent, he was born in Baltimore, Maryland, one of nine children of grocers Morris and Mary Posner. Though he left school at age 13, he claimed to have earned his first million dollars by the age of 21 by investing in real estate, although financial records do not confirm this. Taking advantage of the post-World War II demand for housing in America, in 1948, he developed land and built houses in the Baltimore area, and by 1952, was building more than 1,100 dwellings per year. In 1954, he moved to Miami Beach, Florida, where he continued to invest in real estate and publicly traded companies. He became the head of numerous companies over his career, including Security Management Corporation (owner of rental property in Maryland and Florida), DWG Corporation (Arby's and Royal Crown), NVF Company, , Pennsylvania Engineering Corporation, Salem Corporation, APL Corporation, Evans Products, Graniteville, and Southeastern Public Service Company.