I prefer INV edit in a single player map myself, then it's in-game rather than emulated.
Looks pretty good though - But we may need to search far and wide to find all that clay.
EDIT: I built it with INV edit in Single Player in about 20 minutes - Looks a lot better in-game then it does in that designer. I modified it slightly to look a little better. It's a straight-forward design to follow and looks good, but damn, it's gonna need a lot of clay. And lots of sandstone too but that's easy to get hold of.
