Also, be aware that another dog could learn all the bad habits of your present dog. Dogs are pack animals and have a high pack-drive. They have a strong need to be included in the family. Going outside to feed and visit your dog for 20 minutes a day is not including him in the family. Mentally Unfulfilled Dogs are highly intelligent creatures.
Most dogs like to feel productive.
If you can't take your dog with you to work, or on errands, then find somewhere you can take him. A basic obedience class is a wonderful way to spend time with your dog. Work on the reason that he has become obsessive, obedience train your dog, and let your dog be part of the family. If you don't feel that you are able to include your dog in your everyday family life you may want to consider finding him a home that is able to provide him with the attention, security, and social life that a dog thrives on. May be distributed for educational purposes as long as it is reprinted in full, including by line, website address, and copyright notice.