Can you handle several units at once?
Yes. List the vacant units with the date each one empties, and the walkthroughs for all of them go on the calendar in one visit.
Every unit is still walked, scoped and priced by itself. A two-bedroom left with gouged walls and torn carpet can sit across the hall from one that only wants touch-ups and a door that latches again, and the second is never billed at the first one's price.
Your leasing office hears where each unit stands. If the building uses one paint color, one flooring line and one hardware finish, say so once and that spec covers the whole group.