I'm pretty sure you can buy urine spray online. Spray it around the border of your property so predators recognize that this "territory" is already occupied. Not foolproof but scent markers are an important type of communication between animals.
Human urine works too but depending on where you live you can't just drop your pants and pee around your property

but some people will pee in a container and dump it at the bases of trees and bushes etc. Sometimes I do go next to the run. Not often

but when you gotta go, you gotta go, and if it could help keep predators away then why not?
Foxes, raccoons, bears, lots of animals are becoming less afraid of humans because humans are trying to befriend them, or help them, or whatever else. Not a good idea. It puts people and the animals themselves in danger. Eg a "friendly" bear that has been fed by humans and is comfortable around them is potentially a very dangerous bear. Comfort leads to boldness. If you want to keep these guys away from your property you need to make them wary or even afraid of humans.
Loud noises, motion sensor sprinklers and lights, keep trash securely locked up, DO NOT FEED THE WILD ANIMALS... These are much more affordable options than buying a dog, training it, keeping it fed and healthy... Not to mention the vet bills. LGDs get themselves injured and sick just from being out there in the elements. Vets are not cheap. Especially emergency vets, and a dog being outside 24/7 is an emergency waiting to happen.
(I don't have a problem with people owning LGDs in general. Some people think it's cruel to the dogs, I don't agree, as long as it's done correctly. I just cant imagine having the funds to deal with an emergency at any point!)