We are a family of 7 & purchased into AKV w/ 200 points- During our buying process I "upped" the 160 we were told about to the 200 after going through all the
point charts at all of the resorts for quite some time- We can stay at least once a year for a nice amount of time (as I looked through I never included weekends because I feel that the amount of points needed on weekends versus weekdays is not comprable) So, we plan to always stay Sunday through Thursday -checking out on a Friday- (Again as another PP mentioned over the years this may change and our ownership interests may also change)
We will always need at least a 2 BR w/ all of us - My oldest is 17 and next DS under him is 16 so in a few years we may be good with a 1 BR OR we may want to do a no kids trip just for us one time OR we may let my son go one year and take a couple friends (a studio would be all they need)-
But all in all, for us to stay one year for when we want to go, amount of time etc = 180 points- carry 20 over and bank to use with the next years points and stay in a concierge or what have you-
Sorry this post is so long but just to show the "perfect" amount of points is like another PP said- It would depend on your vacation time frames, the views you want, the time you plan to stay, etc- It will work out and if not... Add On! LOL
We plan to try out all of the resorts at some point so 7 mos booking windows and dates we want will be very important- we will, of course, also stay at our home resort AKV some times so should have more options open at 11 mos and if something gets in our way of that we will stay where there is room open- We just want to enjoy the Disney experience- Resort or parks!