This is actually a hard question to answer because of the time of year you are going. We have done 12 days at Disney (one week at Pop and 5 days at BWV). We actually drove down (from Michigan) and back so that took another couple of days. By the time we were supposed to check out, we were ready to go home but not because we had "had enough". The first week (while at Pop) the weather was gorgeous (last full week in January). The second week? Freezing! Walking around in the biting wind was pretty miserable. So I realized that Disney isn't really where I want to be when it's cold out. The fact that you have a 1 bedroom to lounge around in (we were in a studio) AND you have many more days where you can opt to not go out if the weather is not so good should help. Crowds will also affect your enjoyment - we are always ready to come home when it is too crowded. Best case scenario, good weather + low crowds = we never want to leave! My fingers are crossed for you!
Terri