[xDrive35i]

Looking to buy a bunch of film and video equipment this summer. I already have a Nikon D800 with a couple of wide-aperture prime lenses and a video tripod head. Want to buy a second body and more lenses, as well as some lights, some sound equipment, and possibly new camera mounts for smoother shooting. Should I look into more advanced camera hardware? Trying to spend less than $15k. Could end up near $20k if it's really worth it. And please don't tell me to rent.