We have the nest system to control our central heating. On offer about two years ago was a nest security camera, which we bought, having been considering getting one anyway.
It’s very discreet and we fitted it ourselves to the wooden flashing on a a single story extension.
If someone walks on our drive it pings both our mobile phones and iPads to alert us, and we can view it at any time on these devices.
I wonder if something like this maybe of use to you?