Quote Originally Posted by Zaknafien
But if you think about it, destroying walls is not that easy. A palisade is one thing, but dismantling stone ring walls brick by brick is a little unplausible. Possible, but would take a tremendous amount of organized effort.
Labour intensive, yes; but each turn in EB is three or so months! Walls can be reduced by sapping, presumably, and I assume its's a lot easier to dig a big ditch along one edge of the wall when the defenders are not shooting or dropping stuff on you.

It probably should not get you any cash though (and might even cost some...).