If you want to go with one of the best, I'd suggest http://www.homesecuritysystems.com/adt-alarm-systems. They will monitor your alarm, and send police if the need arises.
To find a door security system, go to Home Depot. Go to the door section where there are alarms and there are many security systems. The prices can range from reasonable to expensive. Talk to an associate for further assistance.
You can find a hotel room door stopper for added security at most hardware stores or online retailers.
You can purchase door security access online at Amazon.com, Buy.com or Ebay.com. It would be beneficial online, therefore you can compare prices, read reviews and return your product with no hassle.
You can find a security system or surveillance system at specialty stores in Florida. They are also available at Best Buy and online. There are many different types.
To find a free security system one would have to do a search for a local dealer as most online "free" systems are usually scams and not worth attempting to obtain.
You may purchase a cheap home security system from many places online, examples of such websites are safemart.com, smarthome.com, nextalarm.com and keepsecurity.net.
One can find security door locks at any hardware store such as Home Depot or Lowes. Security door locks are on average $77.00 U.S dollars and need to be installed by a professional.
You can find online reviews for the Brinks home security on topconsumerreviews.com and alarmsystemsreview.com.
One option is for you to find directions online and install your DSC alarm system yourself. Another option is to find and electrician or home security system company to install it for you.
You'll have to find the manual that came with your security system or contact the installer to get one.
One good place to begin a search for video door security systems is the internet. This is a good source for retail prices. Calling around to local alarm companies in your area will give you the most accurate prices however and the video door security system that would best suit your needs.
First find out what home security systems companies are provided in your area. Then go to their individual websites to see if you are able to apply directly online for their company.