It's not appropriate for any dog to sleep outdoors regardless of breed. If your mom is that concerned about being a bad owner, don't get a dog. There is no reason any dog should chew furniture provided you are a good, responsible owner that trains it from the minute you get it. Our dogs have never chewed furniture and we have breeds known for chewing. As for the floor, there are caps you can buy and put on the nails so they don't scratch them. It's worked well on our wood floors. However, if you aren't going to do this properly, there is no point in getting the dog at all. It doesn't sound like your mom is into this, which means the dog is going to be the one that suffers. Better to spare it the suffering.
https://pawsandlearn.org/Dog_Sleep_Inside.html