Trump, by some accounts, simply kept an empire; but at the worst we can still say he did not squander it. And the USA problem today is one of squandering. Through Barack Obama, the USA threw away so much. A fellow who knows how not to squander, is the fellow we need today.
There was a CNN report that stated that they estimated Trump had made 9.6 billion in revenue last year and employed more than 22 thousand people.
This is not "simply keeping an empire."