I wouldn't stay at Disney for 3 weeks if not planning to do any parks. How did you decide to vacation there and did you consider anywhere else? You will be paying a lot more $$$ for the convenience of nearby Disney parks you won't be using. Not sure how you will get around to shop/sightsee or go out for meals without a car. If looking for someplace warm this time of year, there are lots of others choices and perhaps staying near the ocean could be a possibility. Many beach locations cater to vacationers and you can walk to some of the restaurants, but I would still suggest a car if going to be there that long.