The investor group is backed by tech billionaires Mike Moritz, Reid Hoffman and Marc Andreessen. : A Silicon Valley group backed by billionaires said it’s acquired all the land it needs to build a utopian city in northern California, after quietly buying more properties in the past month. Flannery Associates, the company behind the California Forever project, acquired at least seven more land parcels totaling about 814 acres in Solano County in October, according to county records.