im ready to spend around twenty thirty thousand..
. . . Yeah... I think that'll be enough

is this idea good enough for a final year project... how much time ll it take?? i have one and half years with me
Well, the three main things you will want are:
1. A platform to host everything, including drive mechanics etc...
2. A microcontroller unit to control the platform. Such as the axon/axon 2
3. A camera board. Such as the blackfin.
Is this your first robot? What do you want the robot to do? Face recognition could mean a lot of things...