I draw the line at assuming that he could do as you described without blowback from the courts, the wider public that increasingly polls/votes against MAGA and even the DOJ and the military.
And why do you assume that Vance would/could secure the GOP nomination much less enter into the conspiracy you describe? Again, the notion of an 82 year old heart a beat away from the presidency and electoral coattails way to short to make a difference, is a notion too silly to entertain.
.....create circumstances where he could mandate marshal law due to 'civil war' he created and stop elections for 2028 and stay in office for as long as he wants? Or that he'll support and rig the elections with elon's help for vance to win with himself as vice pres and then have him quit or disappear him and shitface gets sworn in. There's nothing in the constitution to stop that.