If you don't read The AG Minis of Snickerdoodle Street blog, or you don't shop at Target, you might have missed this little storage box that is shaped like a little house:
As you can see, it's not really for the bigger doll; Madeline measures only 7" high. The measurements of the box are 11" to the top of the roof, 12" wide and 8" deep. But it will work for smaller dolls. Here is another picture, this time with the 6 1/2" AG mini Samantha.
You could set up a small room setting, or even just have dolls standing on display. This box can hang on the wall, too, so if you don't have flat space, you could hang it. It is on clearance at Target, so if you want one, I'd say better sooner than later. The inside of the house is colored either blue or pink. It will be in the storage section. This house came out with a great many other storage bins, boxes and baskets, all in bright blues, greens, reds and pinks. At my Target, this house was on an outside aisle, but some of the other items from this collection were on endcaps, so look around if you don't see it right away. Let me know if you pick one up!