You mean the "wall" (err: fence) we already have that no-one seems to know about? Then again, I guess with your comment you're probably thinking that we should just shift all the current money (salary, maintence, gear, etc) going into that border somewhere else?
So again, why do people think Trump is going to be any worse than anyone else? Also, still waiting for an answer to why legal (assuming) mexicans would be protesting Trump?