Hello i just making a motion capture system for my school work. Wich setup i need to choose?

3x Eye cam or 1x Kinect2

if i buy eyecam i just have only one usb3 port on my laptop. And i dont know what its capable.
Ifi buy kinect2 i need to buy its adapter and its cost too much so i need to buy second hand products and i need to test i need to buy adapter or kinect and one of them fails i am done with it. But i can do face rig with it.

H
Setup with 1 Kinect is the easiest to use and can capture many motions but not very complex (there are usually problems with full rotations, for instance). Also, it only requires the most affordable of our licenses - Express.
For color cameras (PS Eye), 3 is the very minimum. We recommend at least 4 for reliable capture. They can capture most kinds of motions, provide larger capture area. However, more expensive Basic license is required, and there are more requirements to environment and clothing.
Here are mor details about differences between depth and color capture
http://docs.ipisoft.com/Multiple_Depth_Sensors_vs_Sony_PS_Eye_Comparison

Regarding USB, it's hard to say what it's capable of on your PC until actually trying. Kinect has specific requirements to PC and does not work good with some USB controllers. For PS Eyes you'll need an USB 2.0/3.0 port for each camera. You can extend the number of ports by using an USB splitter if necessary.
Probably I'll be able something more definite about capability of USB in your laptop if you post a screenshot of Device Manager with USB devices.