Should we get another dog??

So I need advice from all your dog lovers. My husband and I have a 5 month old baby and a small dog. She's a mix with yorkie. This dog is my dog and naturally my husband wants a big dog. He wants a german Shepard husky mix. He's found a litter and they're very reasonable. My dilemma is that we have a very small yard and a small house. Our house is only 1200 square feet and our neighbors house is literally 8 feet away from ours. So I'm concerned on where this huge dog is going to be able to run off its energy and I know when dogs arent able to get their energy out that they can become destructive. What would u do in our situation???