I know there are lots of transients around that are looking for certain things and we have lots of break-ins to cars/back sheds/occasionally houses so I just leave something like a dollar or 2 beside the door on the counter as a sacrifice to keep them from going thru my house that has jingle bells on every door handle.We're less than an hour from the border, too close for my tastes. We know what they took, we gave a list to the police in our report. It was stuff you'd keep in a garage: tools, a shop vac, car stuff, fuel cannisters, fishing gear, gardening/lawn stuff, etc. I guess we'll be buying a lockable shed later. I need to be able to use my office again at some point.
Your motion sensors lights are a good first step and if you can't be there armed all the time (which you can't - and what happens if you are and have to shoot, etc...) I'd think of other traps/sacrifices/deterrents. I hope you get your locked shed soon too.
I don't know what they value most but some kind of cheap sacrificial item outside the fence, then prickly pear or cholla along your most vulnerable "borders" of your property, then a dog who can sound alarm so you don't have to spend the nite outside - you just have your arms ready when he sounds alarm.