This doesn't look like it comes with the camera case, just the case for the pi, right? 

Also, the page doesn't say what the coms method is when you build this, is it wifi? Isn't it important to have solar power for security?  

 all good questions

many sources available for a project like this, do the googles 

 https://adafruit.com also a great resource for parts and guides

also like tomshardware.com