Yes, yes I know we’re already kind of there, but I mean without the current infighting and clash between finance vampires and industrial vampires and other gridlock factors. 
Fascism burns itself out fast with the constant need to purge and loot until nothing is left, so I know even 20 years of unmitigated fascism is a stretch. Still, what do you think a “they get absolutely everything they want, fire all US government employees and replace them at the low echelon with Billy Bob, the middle echelon with James Holden Bloodfeast III, and their favorite Youtubers at the top echelon” complete and total MAGA victory might look like? 
Try to hold it together and stretch your sense of disbelief that the hogs get the feed they’ve been squealing for, from mere reappropriated resources (the way nazis murdered and looted and redistributed to their favorite failfamilies) or even something surreal like the incel supporters actually getting government issued slaves while destroying all other safety nets entirely, if you dare. After all, Dr. Professor Lobster Esquire PhD MD says that’s the price of civilization, bucko. 
Let’s be generous and assume no outright nuclear war, just so there’s something to actually visualize other than a more actually historically accurate version of the Fallouterino treats. 
I don’t think there’s a coherent answer to that. They want specific policies, and they want specific results, and they’re not the results that come from the policies they want.
They want the government to do nothing, except also kill their enemies, and suppress anyone they think is inferior, and definitely stay out of business, except censoring any woke media. The results are what you expect from a fascist government - a few brutal years then it disintegrates under social unrest and bad economics.
But the result they want is a wholesome old timey sitcom with a doting wife and no sign of non-white people except maybe as maids and farm laborers, and also they’re allowed to sexually harass their secretary and the mismatch between that and the doting wife fantasy is her problem. And I think that’s, like, physically possible, if the government does a whole lot of repression, provides a robust white-men-only social safety network, and enforced hiring quotas (of white men). But those aren’t the policies they want, and there will never be popular support for a nazbol movement (thank fuck), so it won’t ever happen.