Cheap Security

How do you secure your (creepy) house out in the woods?  What is the best and most cost effective way to secure it for less than the cost of the actual property?

I’d have to go with eight foot chain link set in three inch posts.  While a concrete wall on a footing would be the best, its not totally reasonable to do.  But for less than a few grand you can buy rolls of the fencing, posts, bags of concrete, and a one man gas auger. In just a days you can put up a fence with some serious stopping power.  If you set the posts deep and use a decent bit of concrete the fence will hold back hordes of the undead with ease.