All these things are multiple visits. We have a tendency to think of things from a single crew showing up and doing everything. When in reality, the NV OEM's are subcontracting out different components to different firms. The companies that install the microwave, are different than the ones who install the cabinets, who are different from the ones who install all the tower hardware/coax, who are different from those who configure, etc., etc.
There are very few people who have the skills to do all this work from beginning to end at a site. Each subcontractor has specialized techs who know their portion of work.
Robert