His enemies are EVERYONE in the political establishment. Think about that. He has no need for money, power or influence. He's got that. He has no need to make a "party" better. So what's his motivation? Love of country. THAT is anathema to the political class.
That is a helluva assumption on your part.
But even if your assumption is true, it gives no indication of what he will do out of love of country. His policy decisions could be well intentioned but absolutely destructive. We just have no way of knowing.
The best we can do is look at what he did and said all his life up until the point he started running for President. I assume, for the obvious reasons, that any new position unveiled while running for President is adopted for convenience. But if you look at Donald Trump prior to 2014, it looks like his policy decisions as President are going to be typically collectivist and hostile to traditional conservative positions.