Actually it's 8000 homes not 8000 people.
"an 8,000-home community in the Mexico City suburb of Tizayuca" (Probably 20,000 to 24,000 people)
Also
"Rancho Don Antonio and nearby Santa Matilde, a community with 7,000 households also in the process of being introduced to the HotZone"
Im not sure if the 7000 Households is each community or both? (But add another minimum of 17,500 to 21,000 people)