Have you thought about doing a study abroad or a project over the summer holiday or the christmas holiday season? I know that alot of Universities in the U.S. offer vacation abroads where they help out a local school, community organization or governement agency. I know this would be less than ideal considering what you have written in the posts previously but I do know that this would be a great immersion for 1-3 months and would be VERY beneficial with your spanish.