LOL! 8 people or so is our normal crew!
Before anyone can really help you need to provide a tad more information. You see the ideas are all over the place right now becuase folks have no idea what your boundaries are.
We booked a 2 bedroom villa at OKW last trip and it worked well for 7 people, however it might not for your party. We have no idea the comfort level the adults have sharing space.
Personally, I think that if your group has not traveled together before, and if you have not shared space before, I would not start in Disney. Not in rooms, not in family suites, not in the Cabins, and not in villas.
I would start with a budget that includes lodging and food for each family so that you know what level of stay you all can be comfortable with and book three rooms at that level of resort.
I would fiddle around on the website so you know what the general cost will be, and in order to have an idea, I would include the dining plan in for budget considerations. You do not need to book a plan, but if you include it in the cost, you know the budget you are presenting to your family will have food included.
From there you can work your numbers. Go up or go down, including dining or not, at least your proposed budget gives everyone an idea what food can cost.