Caiyun, a townsland with 12k pop, now has a production of 13 and a consumption of 28. At food prices of 50 gold/100 bushels (next to worst case scenario, worst case scenario being "there is no food to be had"), that translates in the long term to 53 gold per week of extra spending to feed a townsland, which feels reasonable to me. I currently lose 10 extra bushel per day to rot (I'm at the high end concerning stored supplies), so that's an extra cost for safety.
