At the time, he was the richest man in America, the Donald Trump of his day. He was obviously a very intelligent man, as a tour of his estate and farm amply demonstrates—multiple business ventures tied to his crops and the Potomac river flowing by. If you ever get a chance to visit the Mount Vernon estate and its visitor center, it is well worth the trip.
Used to live in Maryland, been to Mount Vernon and Montecello. My Grandparents house was built in 1815 and had slave quarters in the cellar.
Washington was intelligent, but his influence as a moral force was his best quality, IMO.