Go to a village, steal some cows, and sell beef and skin in the cities.
I start in this way, and I gain more or less 1500-2000 shillings for every city where i sell these things.
Usually I slaughter only 2-3 cows a time, selling fast for avoid the lowering of prices.
Also, beef and skin can be exchanged in villages against some other precious things, like cloth: you tale cloth without lose any shilling, or paying only a fistful of them, and sell in city at high price.
E.g.: i slaughter 2 cows, sell beef and skin at a village, taking cloth and cotton, giving 10-15 shillings, then I go in a city and sell cloth and cotton at 150-200 shillings at piece
Not bad,huh? But I like be a merchant, than I like fight on the field...after all we had the Sea Republics (Genoa Venice Pisa and Amalfi) and I come in partfrom real Norman stock then I know how sell and get gold...he he...
@Verael: I appreciate very much your saying: usually my gain with beef and skin its used for get some decent weapon and armor, and then come to the local abbot/bishop to give money for have the minimum renown for be taken in the army...
Yes, serve in a lord army it's a very good way to learn fight and gain easily. For me, it's a pleasure, because I like much be a soldier and grow in the time getting promotions.