Leo says that Yi Home Camera is a very affordable home security camera option for $35. There's another one for $59 that can be remote controlled to rotate horizontally and vertically. Leo has been using the Yi Action Cams, and they're very good and compete well with the GoPro.
The only thing Leo would be concerned about is that it may not be secure enough to prevent someone from hacking it, like the issues Foscam had. Yi is made by Xiaomi, which is a very big Chinese company, so there's a better chance it is more secure.
Shodan.io is a search engine for finding insecure Internet of Things devices, including cameras.