Your house is going to smell different. Dog owners don't realize this as they adapt to the scent, but when we bring dogs home there is a distinct smell. Even your car will be different. Cleanliness will become a challenge. The dog may have a stomach issue at night because of which there will be poop/ vomit sometimes when dog owners wake up. The financial expenses - medical and food costs rise for families. Exercise needs have to be taken into account. The stimulation need is a very real need for different dog breeds.