I see, well, there are many greater riches than monies, which I'm sure you know. Although, having monies does make things easier.
Here's a recipe to smoked sardine rillettes...not quite sardine yogurt, but as close as I could find:
https://cooking.nytimes.com/recipes/1017047-smoked-sardines-rillettes
As long as you enjoy what you're doing, that's all that matters.
Cheers!