My research tells me that an Isaac Streeper went to the West Indies in 1796. He would have been about 19 years old. He may have had some money to buy property. His family was of Quaker heritage and of German/Dutch/Palatine descent.
Later, his brother, Richard, is a confectioner, not a baker, at the port of Philadelphia. It sounds like he handles sugar.
How could I learn more about Isaac?