I made my own humongous caravan and manually trade over the whole map.
I have learned all prices on all trade gods expect all weapons and armour and know what is good price to trade.
It is a bit too easy to make money imo, it should be harder and more of a challenge.
We need more expenses, army wages and low food consumption is not enough.
I like the idea that you have to supply horses to troops. I think we should have to supply weapons and armor as well. A full set of armor and weapons for 100 or what ever the soldier upgrade cost is too low.
OK for lowtier troops but for high tier it should be more expensive.
And before anyone complain, they should add economy difficulty. Current state should be "very easy" and what I suggest above should be easy.
And on realistic you have to pay normal weapon and armor price for every soldier. (or supply the needed items from inventory.)