Advice on workflow question?

Hi there, was wondering if anyone here could tell me if this would save any time at all. In rendering environments or scenes using multiple passes where there is camera movement, if I rendered a series of still images using different camera views with alpha, and parented them together in after effects, do you think the overall time to get the finished shot would be any less than if I just rendered the whole scene internally? For example, a 180 pan around a room, then moving through to another room. My pc is quadcore with 8gb RAM. Thanks in advance for any advice!