The Community Land Trust Association of West Marin and other local residents are mobilizing to purchase the 39-acre Coast Guard housing complex in Point Reyes when it will be sold next year by the federal government’s General Services Administration. “This started off kind of low-key, as if were in the distant future. All of a sudden it’s not. This is happening,” Marshall Livingston, a member of CLAM’s board of directors, said at Point Reyes Station…