It’ll be ~5 years before all appeals are exhausted. I’d be shocked to see that he ever eats a final conviction, and any Republican president will pardon him, living or dead.
And, even if he is convicted and not pardoned, the functional challenges of managing Secret Service protection in a white-collar prison would be daunting, not to mention that his SS detail seems to have been easily corrupted to lie for him. The SS leadership, a locus of supreme bootlickers, would likely tell an inquiring judge that it’s too difficult to protect him in any penal institution for white-collar criminals, which will force the court to choose house arrest at most.
So, it’s probable that he’ll never serve a day in jail or prison.