Federalists want a stronger national government and ratification of the Constitution to help properly manage the debt and tensions following the American Revolution. How could you refuse this?
Federalism was dominated by big business interests and wanted government to help regulate the economy; Anti-Federalism was dominated by farmers and smaller communities. Why be an Anti-Federalist when farmers dominate that? Best is to be led by experienced individuals.
Very prominent figures such as George Washington, the 1st president of the United States, and Alexander Hamilton, one of the founding fathers of the United States, supported Federalism.
With Federalism, central banking and central financial policies will make handling and managing your savings much easier rather than having your money on hand and risk the chance of spending it all at once.
Attend the Constitutional Convention to support and become a Federalist!