BUMMER! I feel your pain, what a downer, it sure adds a huge amount of labor to the process! On the bright side, you have some images to work with! It even looks like your exposure was changing too, is that true?

I'll bet you’re shooting fluorescent vapor lights, they are NOT a constant temperature and your d3 is picking up the variation and setting a WB based on the "flicker" of the light spectrum. Not much you can do but set try a custom WB on a white shirt or white card and see if that works. I think you can also program some custom white balance images in the camera and use those for a reference later in PP.

If you can’t use a flash, what about portable floods? I know it's a bit late for that, but this might be a place where you need more constant lighting. It's an added cost but maybe renting some good floods in the future and setting them up prior to the shoot is the answer. You may have to get the help from the building supervisor to hang the lights, but it would do the trick. . .

I feel for you though, this is a tough situation.