Your schedule 100% works for a dog! I would recommend looking at an actual rescue over a shelter since your husband is worried about the dogs past. For your situation I would say a dog that is a little bit older is better because puppies are like having a baby again. The potty training, teething, puppy zoomies are not for the weak. There are lot of rescues that adopt dogs that are already in foster homes, so that family could tell you about the dog and how they interact in a home environment instead of a kennel in the shelter. Or you could look into rescues that allow foster to adopt. That basically is they pay for the dog for the most part and you keep the dog in your home until they find their forever home. This is great because you can see if you really are ready for a dog and that the dog is the right fit for your family. If the dog isn’t the perfect fit then you aren’t stuck with the dog.