I.e Bescanon on EC is wealthier than Slimbar city and almost as wealthy as Krimml city. Not to mention that it produces a lot more food, so they can be more than self-sufficient.
The major advantage of a townsland is that it can feed itself.
The major disadvantage of a townsland is the lack of fortifications. And no siege workshops. And no bank.
Though I suppose you'd have to give them a bank...
Yes, there are some very rich townslands in the game. Being able to secede a townsland make a realm out of it would be interesting.
