Actually I guess this is a very valid question and has been asked of us many times. It all boils down to when it is all said and done we want to say we have lived life to the fullest. We both feel our lives will be greatly enriched by this experience.
Travel is freedom.
It's recess, and we need it. I have traveled a small amount with one trip to Australia and New Zealand about 10 years ago and also to London and Ireland 6 years ago. We have also made several cross border excursions to Mexico while in college in New Mexico and more recently to Canada this past summer. All these trips have only fed our desire to explore and discover more. To undertake a journey of this magnitude isn't as difficult as most people think, it just takes originating the dream, setting goals, developing a plan , and staying committed to it.