There's a bunch of stuff on heavy discount in anticipation of Prime day. Lots of blink units are 50% off and I was pleasantly surprised to discover some of those outdoor units are now wireless with expected 2 years of battery life from AA batteries.
https://www.amazon.ca/Blink-Doorbell..._D_6f1dd35b_12
$170 for 2 outdoor cameras and 1 doorbell camera ain't bad at all for entry level. No idea on the compatibility with automation software (and I wouldn't hold my breath because it's an Amazon device) and depending on your needs, spending a bit more for better quality stuff is worth considering. Something I wouldn't consider for myself, but inexpensive enough that if I wanted to set up something basic and dead easy for my parents place, I would consider it.