Tell me you are not serious about shaving your CO? It is not good for them at all. Their coat structure is climant resistant and can stand for harsh weather condidtion and if you are to cut CO's coat in your weather conditions the dogs skin will burn!
The big coat is for protection in the winter and also from the sun!
I don't recomend you to take Working line CO to protect you property because you don't have a glue how they behave and can you handle this dog. Any way these days people use dogs as pets and hire a security comapny to protect the house :)