This scenario is really a lot of fun. You have to provide lots of food (100 units per year after several year) and fight off armies all over the map. This is one of my favorite maps of all time and really helped me to master trade. For a long time, I kept going into debt over and over until I realized the proper strategy. You can make two goods at home, and you can make two others from imported raw materials and then export them. In essence, if you build slowly enough and correctly, this city is a cash cow.