The assumption to make here is that Trump is willing to try to do everything he's said. This is a guy who literally tried to ban Muslims after all.

Personally, I think that the tumult of his administration is going to get in the way of its own agenda, as evidenced by his first presidency. Half of the people on his staff will be gone before the first year is out, and Trump is going to spend more time golfing than he will actually governing. His biggest focus will be on monetizing the presidency, and he surrounds himself with incompetent sycophants.

These and other factors make it difficult to say what he will actually achieve.

As for the ACA, it was a conservative court that stopped him the first time, so the SCOTUS is no slam dunk. I don't think anyone can definitively state what will happen with regards to health care in this country.