We got the dog from the pound, she was going to be put down. I wouldn't let the fear of an emergency keep me from having a dog, that would be silly. If we didn't adopt her she would be toast anyway! Pets tend to improve their owners' outlook on llfe, maybe someone here needs a pet more than they know.
I live in a city that has a lot of parks that are just out of dog walking range, and are also difficult to park a car near. The dog would be able to pee on a lot more trees and chase after more squirrels if she learned to enjoy trailer riding.
Matt