Who do you work for?
Anyone paying for an empty unit: apartment communities, management companies, landlords, investors and single-rental owners.
Forty units or one townhouse, the process is the same: a walkthrough, a written scope and price by email, and no work until you approve.
Owners with one or two rentals usually want the price and the ready date first. The scope lists both, and a tight date is raised at the walkthrough.
Management companies can send their make-ready checklist, paint colors and flooring spec, and every unit is turned to it.
Several units at once are fine. Each is priced separately, so one heavy unit does not raise the price of a light one.