Can you get a husband that gives you free money like ysolda in skyrim?
What you are looking for is a husband that is a Merchant, and there are quite a few of them. For a complete list you can go here but here are the names as they currently are in the game:
- Balimund
- Filnjar
- Halbarn Iron-Fur
- Moth gro-Bagol
- Quintus Navale
- Revyn Sadri
- Sorex Vinius
- Wilhelm
I think only Halbarn requires the Dragonborn DLC, the rest are just out and about in the world. (can get more details on their locations on that wiki page link above).
It doesn't matter if your character is male or female, you can still marry Ysolda.