Mala what you do is craft in a low prosperity village because the goods are cheaper and then make a run to a high prosperity town / village because they will pay more + you get Far away goods bonus. NEVER sell the goods you're making to the town you're making them in.
The problem here is time, risks and a good trade area.
Most of the villages with low production costs are overcrowded which leads to lower crafting chances.
Then i need a good trade route, so i have to travel with the risks of badit ambushes.
At last there is the time thing. I have to watch for the right point of time, when i arrive in the village to sell my goods.
Ohh, and another problem. If i produce at a village with low cost, travel to one with high costs to sell my stuff here, then i would have to travel back to my origin without any trading items.
On the other hand, if i stay in a village with high production costs, then i can produce my stuff continuously without any risks and a guaranteed profit of 11 gold for each item.
I can produce Mail Shirts for 83g.
From the vendor they cost 199g.
So if I charge, say, 150g, you save 49 gold each and I profit 67 gold each. Win-win! Since I can make 29 of them an hour, I could potentially make 1943 gold per hour.
Even the low end items can be good if you have high skill in them. Even if your profit is 5 each, if you can produce 30 of them an hour, that would be 150 gold per hour profit.
So! Who wants to buy some mail shirts?!
I would not pay 150 gold for an armour that let survive me only one more hit, but you are right with the numbers, i have forgotten that you can produce multiple items per hour.