Thomas Melone, the president and founder of Allco Renewable Energy, is saying goodbye to his grand Lincoln Square condos. The head of the New York-based firm that develops and invests in solar projects is asking $19.9 million. Melone paid $4.6 million for the lower portion of the triplex at 43 West 64th Street in September 2006 and picked up the upper floor unit at the same time for $3.9 million, according to public records. However, … [more]