I Beg Your Pardon!

I'm looking to start up a business in your world. What product is in the greatest demand? Where should I set up?

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Yrion; former Yrion of Bone Breakers, now Yrion of Nowhere; mongrel of forest people with Earthling humans banished by his tribe, laugh with gusto. A long and melodious manifestation of pleasure. Then he said:
_ I beg your pardon, cousin! You just made the best joke I heard in a very long time. Did not escape me the surprised look in your face, and I understand your confusion. Worry not, we are family and I will explain why your question is so amusing as well as I can.

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You see: one do not just "start a business" in this world. Well, one do start a business. New enterprises came into existence all the time, about everywhere. I just realize how confuse that must sound to you, perhaps I give you the impression that I am contradicting myself? Not the case! No one starts a business "in the world", that is not the pertinent ground for business here.
Father told me a good deal about Earth. Up there you could hit the ground anywhere and consider yourself home. One nation, one caste, one talking specie. Compared to that Sharitarn is... complicated.
Take this place for instance, that's a temporary camp build by outlaws. They call us "Lawless", and we all share the same family name: "of Nowhere". Things here are relatively civil here at the moment, because there is business to be made with the farmer settlement nearby, and with some wild tribes from South Pole Islands. You only saw one murder today, that is a considerably low number.
Among lawless people you can certainly begin a business anytime, anywhere, buying and selling anything you want. Good or service. There is no taxes to worry about, and no laws.
On the other hand, there is no laws.
You see the implication? Anyone can take what you have from you at any time, cut your throat while you sleep if stab you on your back don't suits them. Is hard to work with that kind of commercial policy going on all the time. Closest thing to a "business" you will find among us is piracy, whenever a band of lawless gets their hands on a ship and can find a fisherman or sailor caste who knows enough about sailing to use it.
Inside ships hierarchy and discipline are a matter of immediate survival so often that lawless bands of pirates can stay together long enough to form bonds of friendship. Or the next best thing, possible among those who have no honor.
Wild people are one way or another autocracies. There is all kinds of nomadic or semi-nomadic savages on Sharitarn, including my mother's people. They are more different from each other than the civilized can be in their worse nightmares, but in all cases you will find yourself in need to be a member of the tribe to even think about start a business in the tribe. Then you will need the permission of someone: elder, shaman, war-chief. Depends on the circumstance, but who ever it is will not be someone who likes innovation for the sake of innovation: I can promise you that much.
Next step in the line are the Feudal Domains. As autocratic as the wild tribes, but they are usually larger and far less mobile. Warlords in their castles, controlling a small region around their walls, serving other lords or being served by them depending on who came on top in the most recent war. If you have a skill to offer, something that is relevant to them, and that isn't forbidden by the Exclusion Law, they you will have a home and a chance to earn citizenship. However "citizenship" in that case is a world used loosely.
Your business is yours as long as the Warlord says so. He is likely to follow costume, but you don't know what costume is until you have lived a couple of decades in the place. Therefore it may not help you much.
Go up and you reach what counts as civilization around here: proper law, put on paper and everything. You have to be accepted by a State City to be really a citizen_ properly speaking_ on this planet. Up there you pay your taxes, look for opportunities, and can call the City Guard if someone tries to rob you shop. All that comfort comes after you gain your place in the city, by being accepted by a caste.
Oh yep ! There is that, cousin. You have to choose a caste, get a invitation to be tested, and pass their test of admission. Only after that you can open your business inside walls.
If your caste is not Merchant Caste you probably will need their permission, what means some sort of periodic tax. And someone pocking your affairs with a inquisitive nose every other month.
Now you got the picture!

So:

You are a seasoned Merchant Caste, if I interpret you well. Or would be if Castes existed where you grew up. You are also family, and I happen to have some monetary savings buried nearby. Suppose I invest in your business: what could you dedicate yourself to? And more important, WHERE ?
There is this place, a feudal state in a peninsula of a lake North from here. They call it Lovelleter Castle, on Night Swimmer Peninsula. Or vice-versa, this people keep changing those names. In any case the place is a Feudal Domain with some local influence. Normally the nations in this region hate outsiders, and particularly dislike those who look that their mother was more than half a tiger, or a bitch. That's one reason why I would think twice before go up there myself.
However, they do like Earthlings up there. 
What makes this particular feudal realm different from the others is that the young brother of their feudal lord just came back home with a very non-human "wife" (the actual name for her status here is something closer to "free companion", but the differences between the two concepts are not essential topic in this case). Who is also a very noble, and rich, lady from a large and powerful state city. As suitable for her status the lady is bringing a considerable number of servants, guards, maids, and scholars.
All those people, I think they are called "elves" for most Earthlings here. All those elves of high birth must be used to a lot of items they are not likely to find available in the market at their new home.
Most of it is beyond our reach, jewelry and silk, and expensive magical drugs. However, I happen to have a contact with someone who makes business whit the daugnar people of South Pole. One thing the daugnar are famous for is their ice-cream. Hundreds of flavors, excellent quality. 
To be honest the daugnar are even more famous for dismember humans alive, and for cannibalism, but ice-cream is easier to transport. And elves love ice-cream, I was told.

Item type

Consumable, Food / Drink