Tho it does interfere with the wedding preparations, i think its also a good way for the other nobles to know about Ripley's capabilities other than being the Duke's fiancee. She can be acknowledged as a good business woman and not be entirely relaint on the Duke's fortune, but also be financially capable.
As much as i want to see more about their wedding, seeing ripley investing in a business, in an era where most women are mostly raised for marriages, makes me really proud of her.