Big Quinn had a different perspective. As a black man who grew up in a slum, the environment and security of a residential area were very important to him. He didn't care much about things like yards and front doors.
He wanted to move to Pine Tree Tops because the security of the area was amazing. Moreover, Pine Tree Tops was an upper middle-class residential area. If his children grew up in such an environment, their upbringing would be better than it would be in the slum.
They went to view the condos at Pine Tree Tops. Big Quinn also brought Li Du with him because he couldn't enter the residential area without Li Du.
Pine Tree Tops was a closed residential area. There were security guards and it was accessible using access cards only. If they were not accompanied by residents, they should check in at the security office before entering the area.