This might be a helpful tip to a few people out there. I used to work as an auto tech (cars), and rolling tool carts were not only an easy way to transport your tools, but also a great way to keep things organized. I'm also using the same practice for my camera equipment.
Here's a peek at a few tool carts i'm using in the studio. These are just basic tool carts you can find at your local hardware or auto parts stores. The tool carts roll close to the set, giving me a table area to work on, while keeping all the gear together and easily accessible. You'll have less of a chance loosing small parts (batteries, SD cards, lens caps).
Some of the items on the cart during a shoot include clamps, small hand tools, charged batteries, white balance cards, slate, QR plates, audio recorders, headphones, lenses, camera bodies, microphones, friction arms, HDMI Monitors, cables, and of course gaffer tape. There are expensive dedicated Grip Carts on the market, but for now I seem to be getting by using these inexpensive service carts.
I would first check your auto parts store or hardware store to see if they carry something like this. I purchased the black cart for just $60 bucks at my Lowes, but you can also find many different versions online (here).
Rolling Tool Service Equipment Gear Cart