The thread on how to avoid being robbed mentioned the usefulness of having a video security system at one's residence as a deterrent to crime.

Could the board members who have experience on setting up such a system please share some tips and information on how to go about it? Can it be a do-it-yourself project? How much would it typically cost? What kind and brands of equipment should one get? Do you know of any reputable companies that set up these systems for a reasonable price?

Thanks in advance.