I would think it would be better to have a crew of generalists up there to construct the station and use big dumb boosters to launch all the components in a short amount of time. Then you put them together in a continuous effort until it is done.
The way NASA is doing it is job security for the Shuttle program and for Mission Control and Mission Planning. We could save a lot of money by not training for every turn of the wrench.
If you want job security from success rather from government largesse, drop us a note.