That would be great...IF Trump loses the house will appoint Biden (hopefully). Trump can be VP. There is no way Biden survives 4 years. Trump can run again since he wasn't elected in 2020. So Trump in 2024.
I don't think that can happen under normal circumstances. I'm almost certain that the Senate can only select one of the VP candidates whose ticket has received an electoral vote to fill the office, and if more than three President/VP tickets have received at least one electoral vote then the VP has to come from one of the top three.
One intriguing possibility would be for a group of GOP electors from states where "faithless electors" are permitted by law to cast votes for Donald Trump for VP just so he can qualify as one of the top three. That would be something else, wouldn't it?