Lithonia is only 15 minutes from Atlanta, without traffic. Probably a 30-40 minute ride to Hartsfield and numerous smaller airports to handle private jets, very close.
My money is on Chattanooga. They already has a big distribution center there. Great city. Affordable, for now. No state income taxes and centrally located to everything east of the Mississippi.
Is Chattanooga big enough to handle 150,000 new residents in a very short time? Doesn’t seem likely.