daniel_vera
Author you know in books say there may be more Dragon Eggs in Winterfell because one of kings whent there to talk to Stark and his Dragon layed some batch there. And i would recommend mc to sell syrup that anyone can get from trees , ice trade it south after in hot climets, also you can make primative pelecilin you need bread molt for that, also north has many mountens you also may find Jade stone and Opals. And this may be little cheating you can build furnace like from Frostpunk game. Because he was engenier . Don't forget about Damascus Steel.