OMER ARBEL USED to live on the cliff’s edge. He had a windswept shack perched on a promontory overlooking the industrial port of Vancouver, British Columbia, the sort of experimental space — “no handrails,” he says, “and sharp things everywhere” — befitting an avant-garde architect and lighting designer. Then in 2015 he met a ballerina, Rachel Meyer, and after having a child together two years later, they decided to find a more conventional home, one fully at odds with his personal aesthetic. In his own practice — he builds bespoke residences and objects for private clients and since 2005 has served as the artistic director of Bocci, a British Columbian…