Even if you limit the evacuees to 56 million U.S. conservatives, that only gets you down to 3 years transport time. If the threat is an ELE (Extinction Level Event) type asteroid coming from outside the Solar ecliptic from interstellar space, the detection and warning could be as little as months, days, days, or less.
Without the instantaneous teleporter you can see how impossible the situation can be.
As long as I go tenth.... because they gotta work out the kinks... I’ll be okay with it.