For many years I owned a business fixing and servicing electric/mechanical exercise and PT equipment (not weight stacks) across two states. I didn't care too much for the environment. I called them the "meat market." My tool case was sufficient for my exercise. Or carrying in boxes of replacement parts.
A classic memory: "This expensive ($500 Proform treadmill) shuts down after 15 minutes at 6mph or more." There are four of them plugged into a single outlet with adapters and 16ga extension cords. The belt is worn on the underside and the weave frayed meaning high friction. The user is huge and running the machine faster than comfortable so they hold on to the handlebars and make the machine tow them at the speed they think is exercise. But the unit says 2.25hp. Fix it! We spent good money on these machines.