Home Security products are expensive and created by developers that have no interest in making things easy for end users. Instead, pull that old iPhone out of a drawer and make it the spy cam you've always wanted.
I have a few iPhones lying in drawers around my house. I should have sold them, but I didn't. After the recent thefts that took place in my garage, I've been contemplating getting an WI-Fi enabled webcam that will upload photos. Then I realized I had exactly what I needed in an old iPhone.