As many as necessary and as many as necessary in the future. Minigummint is a false god, desirable but hardly a necessity compared to slaughter of the Islamofascisti, national defense, rebuilding the military, RTKBA, an end to abortion and suppression of sexual perversion as an acceptable “lifestyle.” If you want to cut gummint, start by eliminating gummint skewels, particularly grammer skewels, middle skewels and secondary skewels. Then, we can worry about the rest after we accomplish the more important goals listed above.
So much for "rolling back decades of federal government largesse".