I want to create a mod where the Jarl of a hold pays you a certain amount of gold a day if you are a thane. This would be similar to how your spouse pays you 100 gold a day. Is this possible? If so, how?

Well, maybe start looking at the quest that's responsible for your spouse paying you 100 Gold a day?

I did something somewhat similar in my mo Simple Taxes, but kind of backwards.

Do you want the Jarl to speak to you in person? Or send you a note like "here's your gold thanks for being thane"?