Ethnography Idea

A potential organization I thought of to do an ethnography about is Habitat for Humanity in Bryan. I believe that the people working and even regular volunteers would have developed a unique relationship that is key to the organization's success.  Habitat has done well all around the country in many different societies.  What makes them so successful in so many different places? It would also be very easy to get in close with Habitat as a volunteer.  I have only volunteered with Habitat twice.  Only once at the one in Bryan, and that was early last semester.