I want to make a homemade Google Glass device. No not as amazing as the real one but just a head camera that looks like it. I have the whole design element down like the actual body but i just need the following things.

-small camcorder at least 720p (wireless prefered amd cheaper the better. )
-way to power the device
-way to set up a "shutter button

I want to keep this as cheap as possible and keep it as small as the real Glass device. Im willing to take any information. Also during the whole process i will be filming it and posting it to my tech youtube channel ( ).