He did say several times that we give millions to Mexico in aid. He would just reduce that amount to pay for securing the border.
But Donald has to be more aware of the fact that he would not be CEO of the Country in the same way he is of Trump, Inc. Laws have to be changed through Congress. He can do quite a bit with EO’s... something he’s suggested he will do to counter Obama’s heavy use of the pen. But he will find that it’s a hard ship to turn on a dime.
Apparently not a pen and a phone seems to work too.