I used to make Amish Friendship Fruit Starter...pretty similar though it was just fruit, sugar and brandy. It was made into Amish Friendship Cake. Your recipe reminded me how good that was, may have to start making it again.
I was having some crazy ideas and wondered if adding a pack of jello (no potassium or recognizable yeast killers) to my primary fermentation would be detrimental to the outcome of my wine? Any thoughts?