I particularly agree with Wind In Her Hairs last line. There are just so many variables to deal with when it comes to security. We commute. Homestead/farm on weekends, work home (also rural) during the week so we have security at two properties to worry about and yes, we do worry.
We try to keep our homestead as simple looking as possible. For 3 years we strove to keep it looking Amish but now, with a power pole suddenly springing out of the front yard, it's kinda of a stretch to do that any more. We do keep our vehicles and valuable dirt bikes and tractor, etc, out of sight however and when we recently ran our copper rich electrical cable to the house, we covered the hole with plywood and dirt so nobody would come by and decide to jerk the almost 200 dollars worth of wire out of the ground to support their meth habit.
I think the main thing for us as far as keeping things secure is concerned is using common sense. Post No Trespassing Signs liberally and add game cameras (and post that you have game cameras on the property so folks know that if they nose around you will get them on a picture), keep valuables out of sight or in safes that cannot be moved, and use really good padlocks on outbuilding and sheds and locks on your doors.
I have to admit that our first year on our homestead, we suffered a lot of petty thefts. Garden hoses, garden tools, garden produce and the funniest of all, gas from our generator. DH would fill up the generator before we went to work on Monday so he could fill the gas cans and we would come back on Friday to find the generator half full instead of completely full. Amazing that when we put a padlock on our generator room and a couple of neighbors of the Amish persuasion moved on (no proof but looks suspicious) our generator became extremely more fuel efficient. We just learned the hard way to keep things locked up.
We also scattered a few ADT signs around the property. Like the ADT rep told me when I once upon a time had their service, lots of times just the signs deter potential trouble because folks just don't know what kind of protection you have with ADT. So yeah, cruise Flea Bay and pick some up cheap. They do work.
Also please remember that when you live extreme rural lifestyles, law enforcement isn't minutes away, it's sometimes an hour or more away so be prepared in whatever way is comfortable for you..
Frankly, I like to adhere to the advice that was given to me once by one of our patients.
Make it a habit to clean your hand gun and hunting rifle while sitting on the front porch in plain view of passersby. Maybe whistle a little tune while you are doing it. It keeps folks wondering about you and gives them second thoughts about causing you trouble.