Why are you determined to have a fence that requires taking farm and ranch land out of production?
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Temporarily. Besides, a double fence with razor/chicken wire at both tops is permanent. “Boots on the ground” can be withdrawn by the next administration.
What works to control the border is men and women patrolling the border.
The portions of the fence that have been built are already being breached by trucks, ladders, human pyramids. (see previous pics http://www.freerepublic.com/focus/news/2773201/posts?page=562#562
And more tunnels
http://www.azcentral.com/news/articles/2011/08/29/20110829arizona-border-tunnels-drug-smuggling.html
The design seems to have been to build the fence where it’s cheaper and the builders just skipped places where it cost more than the average $1-$3 million dollars per mile.
http://www.kfoxtv.com/news/18591087/detail.html
The original plan was to increase border patrol men and women by an additional 6000 agents. Only 3000 were added.
That did not happen due to Jumpin Jeffers (not to mention Collins and the 4 or 5 frank RINO’s in the Senate), the fuss over how much money New York City should get and then the turn over to Nancy Pelosi’s control in 2006.
http://www.jwtgovernment.com/pdf/border_patrol.pdf
When there are invasions or breaches, too often law enforcement can’t get there in time to catch them. If they do get there, they can’t catch them all.