It sounds like you have made a good plan. Visit for a while and keep your house as a safety net. I have been there a few times, to Phoenix and Tucson anyway. I personally am not a desert person, but I have friends who love it! It sounds like your brother loves you very much and would love to have his sister nearby. I try to think of life as an amazing adventure. It could be the start of a new wonderful chapter! If not, you can always go back, having learned something new about yourself. Either way is a win!