During 1790–1791 he accompanied Zamoyski's family on a trip abroad, and continued to serve as an adviser to the family, although his relations with the sons (Aleksander August Zamoyski, Stanisław Kostka Zamoyski) had become strained; he would eventually align himself with the daughter of the family, Anna Zamoyska (Anna Jadwiga Sapieżyna). He supported the 1794 Kościuszko Uprising, a failed attempt to liberate Commonwealth from foreign influence following the events of the 1793 Second Partition of Poland, donating money to the insurgents' cause. Upon the defeat of the Uprising, he accompanied the family on their trip to Vienna. He also made some successful financial investments, including in the stock market. He then served as an economic adviser for the Zamoyski and the Sapieha families, invested in their estates, and lent them money.