How to make money?

[Doug-Thompson]

Are there and financial benefits to building the road / market series on an island that has only one settlement?

I don't know about roads, but markets increase trade goods and those can be shipped by sea.

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I wonder: Do low taxes have any effect on trade?

[Sentinel]

I seem to remember that in RWT upgrading markets and / or ports increased the number of routes / places the settlement traded with, and therefore increased revenue.

On an island there are no neighbours to set up land based trading routes with, so does upgrading the market or roads have any effect?

Increasing number of goods to trade is useless if you have no one to trade with.

If you look at the roads on an island, there are carts going from the settlement to the port, but does this mean the market is trading or just the port?

[Foz]

I seem to remember that in RWT upgrading markets and / or ports increased the number of routes / places the settlement traded with, and therefore increased revenue.

On an island there are no neighbours to set up land based trading routes with, so does upgrading the market or roads have any effect?

Increasing number of goods to trade is useless if you have no one to trade with.

If you look at the roads on an island, there are carts going from the settlement to the port, but does this mean the market is trading or just the port?

You know, I don't think I ever heard anyone mention that before about the markets. Maybe they control land-based export routes like ports control sea-based export routes? I never even thought to check, and the land trade routes are small enough to escape notice if that's what it's doing.

As for upgrading markets on islands, they grant a base trade bonus for sure, which means they should benefit all trade routes regardless of type. If they do also generate land export routes (or some such thing) then those they would not get on an island, which as you'll note lists no land trade on its trade details screen. The animation of carts going to the port is simply representative of sea trade. The carts go to other settlements if it's land trade you're viewing. Roads are supposed to give the same sort of trade bonus and thus could be slimly useful on islands, but they fail to even do that in vanilla as I pointed out above, and are therefore worthless unless you intend your troops to run laps around the island.

[FactionHeir]

Roads/Ports define how many routes you can get I think it was.
Markets/Wharfs determine the income amount you get for each resource.

Remember in RTW Ports giving you extra trade fleets?

[andrewt]

Port can be higher than mine if you're capturing a new city with a sizable population. For smaller cities, I go mine first since port income takes a while to develop. Port income definitely goes up as population goes up, might be tied to city development as well, aside from the population of the city.

[Furious Mental]

If you are Sicily I would suggest using the money you just made to send an expedition into the two Saharan provinces. Capture them, build gold mines, and send merchants there. You will make a killing.