I think the border fence would be completed in about a month.
If Joe were president, he would use the illegals to build the fence while providing them sufficient MREs to eat and Vietnam era hardback tents for their housing.
Once the fence was finished he would bus them south of the fence and send them on their merry way.
The silver lining behind the current economic situation in this country - illegals are VOLUNTARILY leaving because they aren't able to find work because Americans are actually doing jobs many pro-illegals claimed Americans wouldn't lower themselves to do.
U.S. landowners whos property abbuts the border with mexico should have a free hand to shoot any illegals they find trespassing on their property. The more landowners who do that, the better because the message will get across south the border to avoid certain border crossing points.