45.4% of San Diego households rent rather than own, against 34.8% nationally. Across the metro's 1,171,278 households that is the largest single source of turnover work: apartment cleanouts, setouts and lockouts, and bulk pickups that recur with every lease cycle rather than arriving once.
San Diego has 1,171,278 households across a population of 3,288,774. Junk removal demand tracks households more closely than anything else: people move, renovate, downsize and clear out, and every one of those is a job for someone with a truck and a crew.
Where these figures come from
Every number in these paragraphs is a Census figure for the San Diego metro, compared with the national figure from the same table.