Trump is a business man and a negotiator but he wants his wall because it was a central campaign promise. So far he hasn't had any significant legislative victories and he wants to go in the 2018 midterms with something to show.

I think he does want to keep DACA but it isn't nearly as important to him as the wall or satisfying his base because at the end of the day they are the ones who will vote for him. When it comes to his priorities DACA is way way at the bottom.