I think you’re correct! I actually purchased a Xbox 360 Kinect and adapter from EBGames ($25 Canadian) and using the ipiSoft 30 Day trial.
I was able to get very decent rough animations in a single day, having next to no mocap experience!
So depending on your budget… this is definitely the cheapest way to do it that I’ve found!
Now if you added a second Kinect and had that set p, you’d probably get far superior results!