HE STILL never said where the money comes. EVER
"I've been doing balanced budgets all my life, in every company I've been head of." - Well, it's easy enough to do if you have the option of selling off parts that aren't profitable, raising a new round of stock or firing thousands of employees. When you're running a country, that's a little bit more complicated: last time I checked you couldn't fast-fire unprofitable citizens
or deprive them of their pensions, their basic healthcare/meds rights, the schools of their kids or their student loans.
The guy is more than vague about where he's going to get the money or what happens if he finds that he can't both tighten the belt and expand the economy.