Just a few comments:
You need a method of synching pictures from different sources.
Using a clap board (or simply clapping your hands in front of the cameras) works just fine.
Record sound separately on a handheld small stereo digital recorder such as the Tascam DR-40 4-Track Handheld Digital Audio Recorder for $180 from BHPhotovideo.
Zoom has also nice and relatively cheap recorders. I have been using a H4n for years myself, but there are newer models with more inputs. Audio would need a more detailed description, subjects are:
-microphone placement (as close as one can is generally good)
-use of cables, balanced connections and phantom power
-radio transmitters
-mixing
-and probably a few I forgot.
Tripods for video are inexpensive at the lower end and fine for the job.
Not in my experience, they are not fine for the job. Good video tripods have a levelling head, adjustment of the camera balance and a fluid pan function. Of course, if all you want is a static shot any tripod will do.
If one needs a more dynamic image, there are devices to stabilise your cam while walking around.
The benefit of an extra camera from another angle is really appreciated when it comes to editing. Always take stills of the place as one can get fill in footage from a still by asking the software to move across the picture in a certain pattern and zoom in or out smoothly on the way. So for each place, also take high resolution stills just in case.
I can only agree to that. Unless the script is adapted to a single camera, it is very nice to have different, simultaneous takes. I have seen pros to use their budget on 10-15 low end camcorders and bring back a product that was much better than the one they would have gotten from a single high-end camera.
Video is nothing like photography. In photography, there is no notion of time.