With Adam's newly formed friendship with Angela from the Maxwell Family, Adam had made a large and useful connection. If he was also successful in forming an alliance with the Epstein Family in the name of the Maxwell Family, he would become the benefactor of the Maxwell Family and the friend of the family head.
After that, the Maxwell Family would be able to rapidly expand its territory and power with the help of the Epstein Family and would become an even bigger help and support to him, especially since all those that he cared about lived in New York.
This would make it so that he no longer needed the Silver Moon Auction House and could merely take it over or make it into a subsidiary of the Maxwell Family. They hadn't done much for him, while he had helped them slightly and also hadn't done much for them.