OK; so then the selling Lords don't have to go home and put up their market offers.
But Lords of food-consuming regions are still functionally unable to go to war, because they'll still have to go home to a market to accept the sell orders.
Uh, no?
They could put up buy orders.
There's usually someone back home who can then complete those orders. Or you have traders - domestic or foreign.
It might not solve the problem under all imaginable circumstances, but it would solve most of the problem under most conditions.
