I now people have done this but what did they use and how much

 

Could be pretty cheap, if you wana wing it. Get a laptop or a pc mod it to power up when you alarm sounds, wire in a few cams...

I personaly have some lil teen age wana be's you know whats living by me who constantly mess with cars in the area, they know better then to mess with mine but just in case, put in some wireless cams, run them off my wireless from inside, my alarm is silent, who actually pays attention to that crap anyways, my remote goes nuts and vibrates, theif takes time because he hears no alarm, i pull out baseball bat, and take care of it while getting it on wireless video inside my house where they dont have access. feel free to whuteva on my idea