I used a panasonic network camera with the ability to email photos when triggered with motion, sound or light. It also had a 12 volt switch to trigger the mechanism from the web.
The same as you, i use the AIMECOR baby monitor this year ,this one is amazing,it is 3.5 inch can Motorized Pan/Tilt.most important thing is that it just cost 60USD with the 50% off code,i can share you the website,(http://www.infantcamera.com),you can have a look.