With alterations, I'd imagine that most coop designs would work. No roosts, nest boxes low down, and building it not too high so they can get in with steps.
The first week or two, you'll need to "train" them. Mine will go in now about an hour after the chickens, sometimes earlier. They are messy, so sealing the floor or putting a layer of something water proof down would be good.
We finally built a box frame to fit over a flat-ish plastic tub, stapled rabbit wire over the top (bending the edges over to "soften" it have not have points to snag on webbed feet) and placed the waterer on top in the middle. Has been keeping things dry. Periodically they go inside during the day to trash the place, even though they have food and water outside too.