My farmhouses at the moment do spawn the Gingerbread Man.. so I assume also the cottage will spawn the Ginger Knight. I put out 12 farmhouses to do the spawning for the button collecting.. and I'll do the same for the Cottages. I'll have to sell some regular farmhouse to do this, but that's what I always do. The Toadstool farmhouses are spawning as well.
For more info on buildings.. check out SW's post.. at the bottom there's a link to the Building Guide.