So, can you really get your bedroom door powered to open and close by using a remote? How much would it cost if you could? oh and do you know where you can get cheap spy cameras (small ones) I'm only 14 but I love stuff like this thanks!
Lock and unlock is reasonably mechanical simple. Electrically opening and closing, while allowing for a non destructive manual open and other safety access concerns isn't. The electrics for either are next thing to identical, just a DC motor controlled by an H-Bridge with stop switches at either end of travel.
For spy cameras, there likely are security stores that can help you.
You could get cheap import cameras, but some wireless ones operate on illegal frequencies.