Full-motion arms and the load a Grand Prairie wall really takes
A full-motion arm is the most requested upgrade in Grand Prairie, usually because the family room and the kitchen want different viewing angles out of the same screen. It is also the install where the physics change. A 75-inch panel at full extension puts a long lever on the wall, and a single stud is not the answer: your installer uses a plate spanning two studs with four 1/4-inch lag bolts at 2.5 inches of embedment, and on the older north-side framing the pilot sizing matters more than usual so the dry wood does not split under the load. The arm gets swept through its whole range before the TV goes on, checking clearance against window trim, a door casing and anything on the console. Cable is run with a service loop sized for full extension, because a taut HDMI at the far end of an arm is the part that fails first. The add-on is $59-$79 on top of the size-based rate. Budget 70 to 95 minutes for the plate, the arm and the clearance sweep.