Please get a kennel for your dog. You can easily get second hand ones. It’s very clear that your dog is terrified to be alone in the house when you’re at work. You can definitely afford a cheap, used kennel. I worked as a doctor before I quit almost 5 years ago when I had my baby. I used to work long hours, 36 hours straight and that’s not counting the time driving home. On occasions, I only came home after working two days straight.. I used to leave the tv on for my 2 cats, timer controlled food dispenser, plenty of water and my upstairs sliding door to my balcony slightly ajar.. just enough for my two cats to escape in case of fire (or if I died in an accident). Likewise, keep your doggie out in a kennel, providing him a chance to escape in case that neighbour tries harm him. Better to do something about it now than cry over spilt milk.