Trump is not a conservative nor is he a liberal. He is a loon that has been given a pulpit and money. His 'policy' positions are so riddled with holes even the Swiss won't call it cheese. His vitriolic ramblings don't espouse conservative doctrine, they are just meant to be divisive and lead to incitement.
Trump is something, but I hardly know how to classify him. He's been boasting about sexually predatory behavior, he's crude, he's a bigot and he's a racist. He does not come across as any type of devout Christian. For a headliner of the "values" party, he's not living many or any of those, and he doesn't seem to be a fiscal conservative.
Trump's economic plan likely includes several elements that have been proposed or supported by liberals in the past. Hillary's plan likely includes pieces that have been supported by conservatives. One piece of his plan originating from Democrats does not mean he is not a conservative. I think this is more indicative of bipartisan work. I think the party lines are not always so extreme and some conservatives will support liberal efforts and vice versa.
It shows that either the plan is flawed and does not work or that Donald Trump is smarter about some things than he appears to be. His businesses have not done well, so it is not clear where this economic expertise is coming from. Perhaps it is a last ditch effort to win.