>>360553915
there are some cheap options around, like making a home made mocap suit, or using a kinect, etc

here is some articles;
https://bubblepins.com/blog/affordable-motion-capture-at-home
https://www.schoolofmotion.com/blog/diy-motion-capture
https://medium.com/nerd-for-tech/motion-capture-diy-e411fcd44a12