Do custom white balance on each camera if your cameras support it.
Shoot something white on each camera so you have a reference in post.
That's the old trick I used in TV when I used to do video. Shoot a white sheet of cardboard or piece of paper (worst case) or even a drum head (if it's white) and use manual white balance. Your cameras should be "close enough" that it won't be noticeable if you go that route.
i am a newbie and so overwhelmed i don't even know where to start.
can you point to a newbie website with a step by step way of doing this.