For shits and giggles, all the towns, their wealth, population, and whether they're connected to the sea, in order of richest to poorest:

Bernwick - Fair, 5,000, Land

Giant's Bane - Fair, 5,000, Land

Palma - Fair, 3,000, Sea

Falkwreath - Poor, 5,000, Land

Sláine - Poor, 4,000, Sea

Calisii - Poor, 2,000, Sea

Normandie - Poor, 2,000, Sea

Pentiloch - Wretched, 11,000, Land

Dyrford - Wretched, 5,000, Land

Attolia - Wretched, 1,000, Sea

Aberwytch - Wretched, 1,000, Sea

If I'm counting right, this means there are 56 trade routes in total, with each town having 10 routes going to it. I'm suspecting tariffs for this annum will amount to somewhere between 10,000 and 30,000 bullis.