You don't own a mocap. mocap is just short for motion capture. there are various programs you can use. Basically you use a camera, preferably a 3d camera such as kinect, (and more preferably, two kinects) film yourself or whatever and the software you chose takes that and build a kind of 3d wireframe of it that you can import into 3d software like blender or maya to convert into the moving of a model, then from there can transfer it into sfm.

To be honest, it's not necessary at all. the animation would still need to be tweaked anyway, and with enough patience and practice, you can get the same, or better level of detail without it.

Lol, at most, the mocap i've seen has only really been good at showing what bad actors the animators are. XD