There is no reference manual for this. Hotlinking the different parts of a larger project as you suggest is the correct approach.
There is a video
herepresented by a firm that shows how they divided up the building into separate plns following work flow.
You break up the building into different physical areas as you suggest, or it could be by parts of the building that naturally different groups would be designing. In the video they took a mixed-use high-rise and broke it up by skin, core, typical upper floors, entry/first few floors which I recall were commercial. Each team had 2-4 people, a realistic 'group' size.
As for your computer, yes, you probably want to have at least one that has more memory for the main file into which all the subgroup files will be hotlinked.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"