To deport 11MM illegal immigrants, you are going to need a really big army. A bunch of jack booted thugs dressed up like soldiers. S.W.A.T. teams. There's at least 4 of them for every one of our men and women in the army, air force, navy, and marines combined.
You're going to go door to door and break them down. You're going to point guns at these people and demand their papers.
You're going to load up hundreds of thousands of school buses or those big canvas trucks with these people. Drive them to the border and at gun point force them to go across the border.
Meanwhile, you have some of these immigrants who had children here who are actual legal US citizens. You are going to deport them, too? Sure, why not. It's a fine way to get rid of even more of these people you don't want here.
You're probably going to have to shoot a bunch of them, because they won't go peacefully.
When they try to come back to get their things or reunite with friends and family, shoot them as they try to cross back into the country. That'll stop the problem, right?
I'm not thinking of the worst way to do this, it's the only way. It's exactly what you are talking about.