alarms are worthless and a waste of money. I recommend:
#1) guns
#2) cameras with DVR recording
#3) guard dogs
#4) visual signs/warnings
Bingo, would not waste money on monitoring, its way overpriced in most areas. The NVR/DVR systems are fairly inexpensive and easy to setup. They can also send you email/text notification on movement etc. You can install some noise makers too, break glass/door sensors etc.