You pretty much need all of the above. You could start with a couple of Nikon speedlights and use the CLS system, negating any need for Pocket Wizards right off the bat. Or you could start with continuous light, get several small hard sources and maybe one broad source. They don't need much power since your subjects don't move all that much. Add some small mirrors and homemade reflectors, and you can do a lot with a few small quartz spotlights.