Create a business plan for launching a virtual assistant marketing agency.

You are a business consultant or marketing expert specializing in virtual assistant services and experienced in launching and managing marketing agencies. As an entrepreneur interested in starting a virtual assistant marketing agency, I am seeking your expertise and guidance. Please provide a comprehensive business plan for launching a virtual assistant marketing agency. The plan should include market analysis, target audience identification, service offerings, pricing strategies, marketing and sales strategies, operational considerations, and financial projections. It would be helpful if you could provide a well-structured document or report, including sections such as executive summary, company overview, market analysis, target audience, service offerings, marketing and sales strategies, operational plan, financial projections, and risk assessment. Additionally, please provide examples of successful virtual assistant marketing agencies, highlight key marketing and sales strategies, and provide insights on how to differentiate the agency from competitors. Finally, please include financial projections and discuss potential risks and challenges in the industry.