I haven’t actually bought it yet, but I’ve been considering the Lorex LW2702. You can get it from Amazon for $250. It comes with 2 wireless, motion-activated, day/night, indoor/outdoor cameras and a monitor. The cameras have a speaker and microphone and can be used as a 2 way intercom. It uses SD cards, so additional storage is cheap.
I’d like to put one each at my front and back doors, but I’m not sure how I’ll power them. The cameras need AC, but just running the cable down to the outdoor plug doesn’t seem like a great idea. I assume the end of my video would be some dude unplugging it.