Wait, you thought this statement was offensive and unhelpful? Have you been following Trump?
Seriously, Trump first claimed the proposed 1000 miles long and 55 feet tall concrete wall would cost 4 billion, then later stated it would cost "up to" 12 billion USD. Just to put these numbers into perspective: The US already have 650 miles long (and not very tall) fences at their border. Those cost 7 billion USD to build...
So, it should not be too surprising that independent engineers estimate the cost of such a wall to be closer to 25 billion USD. More importantly, the Congressional Budget Office projected that the initial building costs would be exceeded by maintenance costs every seven years.
Investing into the United States' "virtual wall" by adding more drones, cameras and sensors would be a
substantially more effective use of taxpayer funds and appears to be exactly what the people who actually work for the US Border Patrol are asking for.