Perhaps worth looking at a PIR (motion) activtated camera that will text/e-mail the pictures to you. You can then 'hot-foot' to site and make sure that your equipment is safe!
On activation the camera will text or e-mail images to your phone or computer. This system will give you pictures of anyone who is up to no-good within seconds of setting off the camera.
Colour pictures/ Video /night vision pictures.
Up to 4 mobile numbers and 4 email addresses at one time.
It runs on AA batteries and requires a 'pay as you go' or contract mobile phone sim card.
It is quite pricey at £299.99, but it could save you that amount on your premium in the first year! Call me to discuss on 2028 2550617 or email firstname.lastname@example.org