[maxtheripper]

The continuing cost of the wall, ie staffing and maintenance etc., will need to be addressed at some point as well.
Unfortunately this would not be a one time expense, it will need to be a budgeted line item in perpetuity for it to remain an effective barrier in the future.

[BlueLancer]

"The continuing cost of the wall, ie staffing and maintenance etc., will need to be addressed at some point as well."

Heck, do like they do for highways ...

Maintenance and upkeep for the next 10 miles of The Great Border Wall is sponsored by Joe's Bait Shop, 101 Main Street, Houston, Texas.