Here's another little snippet for catching potential thieves stealing your hard earned items. Search 'trail cams or trail cameras' on eBay and invest also in a couple of trail cam solar panels. I have several and, though i've not spotted any robbers yet, i've seen multitudes of different animals prowling my finca. Wild boar, badgers, red & black squirrels etc, etc. With a solar back up panel you'll get up to a year out of 8x AA batteries.
You can now get the cameras from as little as £35 with free shipping, shop around for the little trailcam panels, which have their own built in battery.