Final answer:
The specific husband and wife team mentioned in the question cannot be confidently identified based on the reference information provided or general historical knowledge.
Step-by-step explanation:
The husband and wife team that held services in an old saloon and from those beginnings established six new churches within eighteen months is not directly mentioned in the reference information provided. However, based on general historical knowledge regarding religious movements, none of the options provided, such as John Cotton and Richard Mather, John Winthrop and Roger Williams, or Roger Williams and Anne Hutchinson, are known for this specific accomplishment. It might be that the information needed to answer the question accurately is missing or that the question is referencing a more obscure historical event not commonly documented. Without further context or information, it is not possible to provide a definitive answer to this question.