According to Wikipedia (yeah, I know) in 2014 Fedzilla spent $620 billion on defense.
Fedzilla also spent $13 billion on "Energy", $39 billion on "Natural Resources and Environment", $22 billion on "Agriculture", $33 billion on "Community and Regional Development", $100 billion on "Education, Training, Employment and Social Services", $450 billion on "Health", $542 billion on "Income Security". Then there's Medicare and Social Security ...
So yes, you can cut taxes, build a border wall, and improve the military. You just have to quit trying to run a socialist welfare state.
But based on his comments yesterday about the government "taking care of everybody" who can't afford private health insurance, what makes you think he wants to do that? Medicaid is one of the biggest socialist welfare programs (if not the single biggest).