Finally, each sensor will output 6 sets of 2 bytes data (ax,ay,az,gx,gy,gz).
Sending 12 bytes of data 100 times per second is possible. Error detection/correction will require that you send more than 12 bytes at a time. How many more depends on how robust the error detection must be, how reliable the wireless transmitter and receiver are, and how much interference there will be.
I'm currently doing a project titled "Inertial Sensor Network for Gait Analysis",
I can't see where "wireless" is a necessary condition.
- $6 Bluetooth serial
You might want to rethink this.