As the sales models grand opening day approaches, the builder should determine how many sets of keys are needed for access to the sales model complex.
People needing keys include the sales staff, main office management, field construction staff, interior plants maintenance, and the cleaning crew.
The keys to the sales complex should be different from the master key to the empty inventory units and the units under construction.
Plan-ahead this activity of providing keys for those people who will need continuing access to the sales office and the sales models. This then does not become a crisis along with other last-minute issues.