A remote town about six hours north of San Francisco might be the only spot left on California’s coast where aspiring homeowners can snatch an affordable beach house under $400,000. A remote town about six hours north of San Francisco might be the only spot left on California’s coast where aspiring homeowners can snatch an affordable beach house under $400,000.  Crescent City, a small town of about 7,000 people, is California’s northernmost county with about 80% of the region being made up of state or national parks.  “It’s a bit like living on an island,” Adam Goldstein, who moved to the rugged coastal town about eight years ago, told the San Francisco Chronicle .  The average home price in Crescent City is under $400,000 and might be the last affordable coastal town in the state.…