This is why I bought myself some blink cameras. Obviously, privacy is shit (and I've factored this) and you're affectively forced to pay for use their cloud service, but at least the (initial) purchase price is cheap.
But I've 'bought' cameras for far more, only for them to hobble functionality a few years down the line. And they've had vulnerabilities or whatever.
For the sensitive stuff, I have a camera with an SD card, but obviously phone notifications is a big selling point of systems like this.