zinctek

Hello i need abit of help am new to cctv but i have been asked my a friend to set one up for him because i work with computers ( i know that means nothing when it comes to cctv but hey ) I need to set up 8 to 10 camera's using wireless - what i need to know is this possible 2 our door and 6 to 8 indoor. I understand they all need hard wiring in to the mains but i wanted to know is it possible to have a dvr that takes all 10 wirelessly? Thanks for any help. Thank you Dave