You may not want to buy AM, which is understandable, but Turntable Speed is a free app you can download to your phone. It’s not a device, it’s free, and there’s no learning curve—you simply place it on the platter and run it.
You mentioned not wanting to spend money or time learning to use proper wow & flutter measuring tools, yet you invest time and money in a laser device that points at a spot on the wall without providing meaningful, readable output. Moreover, you take the time to record videos of that same laser, upload them to YouTube, and even discuss the spin-down time of the AS2000 platter. All these activities are related to wow & flutter and indicate that you’re interested, yet you choose not to measure it directly. I find this contradiction hard to understand.