Building wall could take at least 10 years, even with 10,000 workers - The Washington Post

Even at 1,000 miles long, the project wouldn't help the steel industry much either ....
https://www.washingtonpost.com/business/economy/build-the-wall-it-could-take-at-least-10-years-even-with-10000-workers/2019/01/09/62d5eaae-1376-11e9-803c-4ef28312c8b9_story.html