Hunter's sentence should be handed down AFTER Trump's. The case came later. And they should receive exactly the same sentence. That won't stop whining from all over the political spectrum; but it could help quell the "equivalence" argument.
As for Trump, there is an EXACT sentencing guideline available. Give him the same sentence as his co-conspirator, Michael Cohen got. Period.
It becomes a no-brainer; should appeal to a wide swath of the crazy right.