>>290601743
They're called base stations and they're kind of hard to get at a decent price right now. I get your point.

With Kinect just remember to always face it and be sure to set your height so that your viewball is where your eyes are and your feet balls where your feet are. I had a bad time with Kinect because I didn't know how to calibrate into full body properly. You can even sit down if you do it just right.

You could also consider that the trackers are known to run out of stock and whenever that happens you can sell them at MSRP or more.