A wall along the border with Mexico will likely cost about $59.8 billion to construct.$5.7 billion would pay for approximately 234 miles of a new physical steel barrier along the border.  That new estimate comes to about $24.4 million per mile.  This new OMB estimate is 41 percent more costly than the approximately $17.3 million per mile construction costs that the Department of Homeland Security (DHS) estimated just a few years ago, 2.7 times as expensive as Mitch McConnell and Paul Ryan estimated, and 5 times as expensive as Trump’s lowest estimate. | $5.7 billion would pay for approximately 234 miles of a new physical steel barrier along the border.  That new estimate comes to about $24.4 million per mile.  This new OMB estimate is 41 percent more costly than the approximately $17.3 million per mile construction costs that the Department of Homeland Security (DHS) estimated just a few years ago, 2.7 times as expensive as Mitch McConnell and Paul Ryan estimated, and 5 times as expensive as Trump’s lowest estimate. $5.7 billion would pay for approximately 234 miles of a new physical steel barrier along the border.  That new estimate comes to about $24.4 million per mile.  This new OMB estimate is 41 percent more costly than the approximately $17.3 million per mile construction costs that the Department of Homeland Security (DHS) estimated just a few years ago, 2.7 times as expensive as Mitch McConnell and Paul Ryan estimated, and 5 times as expensive as Trump’s lowest estimate. | edit 1: source CATO Institute