Found out that if I tip the flower pots on their side they can be rolled pretty easy.
I've got half of them moved to where I want them. Going to decide where to put the rest over the next few days and place them.
They are 18" high and 24" across. That looks like a whole lot of potting soil. Probably best to get a truck load or something once the weather cools off rather then buying enough bags to fill twelve of them. I know it is something like diameter x Pi x hight or something like that to figure out cubic feet but not really sure.
The ones that I've moved into place do look real nice. Going to have to get something to place under the low sides of each one to level them out.