Honestly, I’m surprised nobody’s suggested the following to him.
Take the undocumented migrants, put them in camps next to golf courses (but make sure they’re not visible from the course). Have the migrants work the course.
Of course, not all of the undocumented people can be thus employed, so there will have to be some kind of list to declare who is lucky enough to stay in the US and work the golf courses.
Let’s call it Swindler’s List.