My first thought : The problem will be with the age of children and worrying about height of beds…
The Cabins at Fort Wilderness or basically a mobile home disquised to look like a rustic cabin. I think they have bunk beds but not certain.
The re-design at some of the Values ,etc , includes a wall pull down Murphy bed and they are slightly higher than the height of the other normal bed (at PoP for example) I am 5’3 and noticed this recently.
I also thought the Art of Animation Family Suites defeat the purpose because you enter the room and the bathroom was to the left and a small kitchenette and a small dining table that pulls down Murphy bed style and then the sofa couch that is a bed and a separate bedroom with a door and another bathroom. So the parents are in the bedroom and the children in the main living room area How are they going to take naps, etc , if the beds are out in the living area?
I guess it is great for having lots of sleeping space but… not really functional with that age of children .
But I do like the idea of a AoA family suite and basic rooms at POP because of the easy walk across bridge to be near or to meet up in morning to take SkyLiner .
the Poly might work because the cash resort basic room has a Queen with the pull out couch and a small pull down sleeping area under the TV. They are $$$ .
The floor plan of the Treehouse Villas at Saratoga Springs are plentiful but I think the DVC resort guests book these and they are kinda too remote which I would hate with young children .
Old Key West are also DVC and are supposed to have a generous amount of space but I am not familiar with these.
Unfortunately the nightly fees staying on property are $$$ .
Would you consider staying just slightly off property and utilize the non-Disney Resort shuttles?
Many hotel franchise suite style hotels have opened just off the Western Way exit on the Animal Kingdom side of the World such as Homewood Suites , Residence Inn, Springhill .
These are Hilton and Marriott owned and possibly offer
AAA discount s.
I notice one child is 9 so you might have to work with school calendar which increases the costs.
Keep us posted with your searching And much more helpful advice is always available .