I feel that I should point out that you are picking the second busiest week of the year(only behind Christmas). You should be prepared for long lines and not too many bargains. We go to Disney often, and have been at most times of the year. I would suggest to you that you pick a less busy time to go. I would absolutly stay on the grounds. They have something for every budget. I would also plan on more time if at all possible. Early Feb is my favorite time. While the kids were in grade school we would always go during the school year. They would learn more at Disney than they would in school. I do not want to discourage you at all, but I want you to realize what you are getting into.
Feel free to contact me if I can be of any assistance at all