There's a quote making the round about how Trump's supporters take him seriously, but not literally, while the press takes him literally, but not seriously. No, he's probably not going to build a wall. I would, however, expect him to focus on immigration enforcement and get rid of executive-branch initiatives like DACA and DAPA. You could probably say the same thing about his other ideas.

It's Trump's style of negotiating: determine a firm point where you would be willing to walk away, try to figure out the other side's walk-away point, then make a first offer that's crazy, but not so crazy that they will walk away. You'll usually get a compromise that's better than you would have got if your first offer was reasonable.