I go back to my earlier premise, that for maximum stability, use a counterweight on the horizontal arm. I actually do this on an almost daily basis. In order to keep a pair of microphones out of view in a video, I suspend them at the end of a 9' boom. The microphones weigh about 2 pounds, and I put a 15 pound weight about 18" from the center on the opposite side of the support pivot. I can support a heavier load by adjusting the position of the counterweight, or the length of the boom pole. The total weight on the center column is under 25 lbs, which is well within the capacity of a Gitzo Series 3 tripod. The tripod has a 40" leg circle, so the boom extends well beyond. I'm using a medium-duty light stand rather than a tripod, but the principle is the same. It also has a 1-3/8" spud socket rather than a 3/8" screw. A columnar camera stand would be ideal in a studio, where you have a smooth, level surface. My rig fits into a 48" canvas bag, and can be used on uneven surfaces by adjusting its "lazy leg." A typical camera stand would have 6' column and weigh 70 pounds or so. You, on the other hand, would be lighter by $1200 or more. Checking the viewfinder on a camera suspended over the product might be challenging. The same monitor I use for shooting video also works when the camera is in still mode. I can put the monitor anywhere I like it using an HDMI cable. I've used it for shooting "selfies" (ID photos). I even adapted a small ball head to the self-same boom pole with a bracket for the monitor or iPhone on the handle. Our local NPR station has a 60' boom they cart around on a flatbed truck. It collapses to 15' and weighs less than a ton.