GLC, it's OK to change your mind about what best fits your life at any given time. Most people wouldn't even dream of sustainability in the way you have. We all go through phases.
Do what's best for you, your DH, what you want. I'm a great believer in "no guilt." You're an adult and you have the right to change your mind. While you might be sad, which is normal with any transition, you have no reason to feel guilty.
I'm anxious to hear about your move to an urban environment.