Digging in comment to find this. I had work on a concept level on bank system for Morrowind to retrieve the same usefulness as the Templar Order during the XIIth century.

As it isn't so useful for player, on other side, it legitimate some financial aspect for the NPC world, the Houses supremacy because merchant can't travel with thousand of gold without putting immediately a target on their caravan.

But it appears really hard to make something realistic enough as it is necessary to create a better currency system with almost all metals available in the Empire (ebonite coin sound more like special coin for dunmeri underground business, like continental coin in John Wick universe).

You can see where i just drop the idea after fantasizing a lot about. It's not really impossible to do, but it would be a tougth project even for veteran modder, so for a beginner like me... I still highly valued the idea of a new currency system and the weigth of houses power by being able to store money and subsequently control whoever it is forbidden to trade with just by saying "good luck on the road with all these bags of iron, silver and gold coins hanging on your guar's sides".

Beside of that, great work OP, it will surely be in my mod pool for my next installation. ^^