More people are buying vacation homes or second homes this year, as its share of total sales rise to the highest level in four years, according to C.A.R.’s Annual Housing Market Survey.  The flexibility to work from home and the desire to move away from metropolitan areas motivated home buyers to flock to resort communities in search of more space and a healthier lifestyle. Resort communities are seeing unprecedented buying activity and price increases, and their markets have been outperforming the rest of California so far this year.