Basically you'd need a USA where...
-the government sees no interest whatsoever in promoting or protecting the well-being of certain businesses through economic intervention(IOW no tariffs, just for starters)
-there are no religious-types who want to regulate away "immoral" or licentious behaviour(IOW cocaine fueled gay-sex orgies for money are as legal as Sunday picnics)
-no one has any desire to assist the poor through any means besides charity(IOW no politician during the Great Depression gets the idea to offer the voters so much as a Hoover Camp to alleviate their pain)
And that's all just for starters. Depending on the type of minarchists running the show, you might even have to do away with immigration-controls completely.
So, long story short, you're talking about an entirely different planet.