Well soooorrrryy, god you must be so full of yourself that you are willing to take away a loved pet form a family that has loved and cared for him for 3years and has payed for the vet bills and the training and all of the devices that we used when he barked at nothing.
I don't think it has anything to do with being "full of theirselves" dogs should be inside, also do you mean like shock collars? I don't like those, your dog was probably barking because it wanted to be inside(where is should be), it was scared, stressed..etc.

Also if your mom signed a legal contract, they aren't going to just forget about it just because you cared for him for 3 years..etc

And everyone pays for training, vet bills...etc, that is part of owning the dog, you say it like you didn't have to do it but you did anyway, but its a huge part of the responsibility of owning a dog.