Yeah, at this point wifi cameras are cheap enough there's not really a reason not to just put a real one up instead of this. 15-30 years ago this might have been a good strategy though. Back then any sort of network enabled camera was kinda pricey, as well as the system to run it.
While not the cheapest, the best wifi camera I've found so far was to build one from a RasPi Zero W, and install motionEyeOS on it.
From there, you could add simple motion tracking (OpenCV or something like that - there's enough in the distro to easily do blob tracking) and command a servo to track.
Total cost for the basic camera setup (not the tracking extra) was around $60.00 - and you don't have to pay for a cloud service or anything like that (I just have it email me the images), plus it's open source, so you can vet the codebase if you need or want.
