venti,
Really you are talking about a "huerta" by the size....Here are the things I would do if I owned a huerta in the Rm...
1) Fence in all side complete with masonry...the columns and the over beam filled with tabique, and not the sodimac pooch panels they sell that you connect with mortar. Maybe the front part on the street I would do a solid reja.
2)I would make my house very solid with no real obvious ways to climb ontot he roof. I would sheet the roof with 3/4 ply and even the cieling lid as well...most thieves in Chile get in through the roof...they get a kid on the roof, he drops in and opens the door...so dead bolts with keys on both sides...
3)Rejas on all the windows.
4)At least 3 dogs and train them to be fed by only you and no one else so we don't get the poisen meat over the fence routine. Make sure that the dogs can get to all sides of the house and cannot be easily sequestered into the back yard.
5)Get an alarm that is very loud and cannot be easily shut off electricaly. You can an armed response team but they can be late so get something really loud that no one would be able to be in the house and stand it.
6)Get an old pensioner couple to live in an out building with the agreement that they will always be there...at least one of them....also get a gardner that works everyday(lives somewhere else) but don't ever let him in the house. Don't ever let the house be alone...if you get a maid then take advantage to go out when she is there. Remember that everyone will talk that it in and around your house....everything you do will be known...so live like the bad guys are watching all the time...if there is nothing interesting than more than likely you won't get hit. If you do get hit and you catch one, then concentrate on one of the guys and kill him as fast and as brutaly as you can, but make sure that he doesn't get out of your house...and if he does, then drag him back inside, show no mercy whatsoever.
7)Go on errands always at different times and never with a pattern, at the same time...the same set up....even go out and sometimes come right back. Avoid predictability.

Make it a point to be friends with the closest tenencia de carabineros...make sure they know your gig and you don't want anything to happen. Make friends witht he bomberos and the cartero
9)Don't live ostentaciously or at least make it obvious. Make your house boring.
10)Build in a secret hide away spot for important items with in the house.
Good luck,
P out
.