If Trump loses in November he'll be in jail by January. The sentencing has already been scheduled. If the election is going to be stolen it'll have to be stolen when the votes are cast or counted, not when the election is certified.
I would too, unless Congress revokes his Secret Service detail. Secret Service protection is what makes imprisoning him difficult, it's either house arrest or they rededicate an entire prison wing to just him.
I wouldn't let him pick his security and restrict his visitors though. And absolutely no internet or social media. It's supposed to be a punishment, after all.