If you need an alarm system, there are a few ways of going about it. One is the non professional to save a buck, it may be enough to alert intruders to stay away, and the professional that may cost, but eases the mind its done professionally. If one wants to burgle, they will, its the mentality if what's mine is mine, and what's yours is mine. Social engineering to stop common burgles is the least expensive. If you truly have the $ for fancy things, spend $ professionally.