Very Stimulating
I extremely liked the economic problem that you based in your story. The trade system was very good and brought in the business side of me. Note that you need to be smart to play this game, as it is highly tatical and involves things that you need to figure out. However, the combat system does get a little too repetitive and I hated the fact that by the time I had about 6 mils I only have donkeys traveling in small carts (apparently the most spaceous cart in the game). Well anyway the states up north weren't that far so trade went good. Anyway when I had 6 mils I only had a partner to work with, as I realized that they block the ways and could only use the grenades. Maybe add an experience gauge to see how you can get to the next level. I played this game for quite a while and still haven't finish the storyline. Hell now I have to play again just cause I was gone for over a year. Anyhow I ran out of resouces in the end cause of overtrading and didn't know what to do. The only extra money in the game probably comes from bandits. The production improvement thing sucks cause of excessive use of resources.
Tips:
I found liquors to be highly profittable in the northern settlements, as for gold I have no idea.
Sometimes you sell something then the price is lower then the amount of money you sold but it again and sell it again. Do this until there is about a $40 difference in unit price
Oil is very uncommon in north and vehicles tend not to be good for trading
After your trade has been abolished try to trade to different areas. Then come back once those areas are overloaded with stocks
Try to raise your doctor and mechanics skills. It is amazingly annoying to repair and heal your carts and animals
Don't waste all your medicines all at once. After a certain health level you will start to heal yourself (increase experience too)
When you start, increase your stat that increases health to max. Once ingame there are no upgrades to increase your max health.
Increase your strenght by carrying stuffs