cost to build wall
If Donald Trump were to build a wall along the United States' southern border, it would cost billions. The U.S. border with Mexico is roughly 2,000 miles long and underlines four states from California to Texas.he actual cost for the rest of the border wall (roughly 1,300 miles) could be as high as $16 million per mile, with a total price tag of $15 billion to $25 billion.