You shouldn't have to board your dog. You said it yourself, you don't want other people training your dog.
I think you should have your wife train the dog more. It sounds like he already listens to you, it will help him respect her too. Get your daughter involved in easier stuff to train or teach her how to work the dog (a heel after you teach one) if you are comfortable with that. Some trainers do skype sessions, I know that sounds weird, but they can still talk to you and demonstrate on their dog so it's like at-home. You shouldn't have to board to 'reset'. I don't think that's how it works.