
O ye of little faith! I make the following suggestions: 1. Make it a wall. 2. Make it from the official National Substance of the United States: Bovine Fecal Matter (BFM), commonly known as bulldust. 3. It will cost nothing. We may not have enough bulldust to wall off the entire Mexican border now, but we will by the time Trump is finished.
Ye Olde Pedant