[Khantilever]

They're definitely going to require a good number of buildings (8 million sq. ft.!!!).

This may be wishful thinking, but I'm wondering whether they've already been considering this site and in discussion with relevant parties. Many of their criteria are almost uncannily fitting for this location (~45 min to airport, near major highway, transit options, nearby housing opportunities and greenfields (Related site??)). If the Post Office has 2.6m sq ft and the size is zoned for an additional 5 million, the total 7.6m puts it almost right at the potential goal.

The only problem is they initially want only 500k-1m. Would amazon want to be in a building with other tenants, especially if that building will eventually be one of many in a large campus?