I predict that President Trump will make a big show of building a section of the wall in each border state, then he will run into geographical, logistical, environmental, financial, and legal issues and the Big Show will come to a screeching halt. (Just like Obama's attempts to made good on closing Gitmo.)
Chanting "Build the wall!" is a drunken rabble-rouser's rallying cry. The morning after will get its revenge. Count on it.
That said, I really like most of Trump's proposed immigration plan.
The least expensive, most effective way to stop the flow of illegals on the southern border is boots on the ground who have the technology and authority to take action. We don't have to house them, school them, or treat them if they are prevented from ever crossing.