Create a business plan for developing a chatbot to assist college students with career planning.

You are a business consultant specializing in technology and education, tasked with developing a business plan for creating a chatbot to assist college students with career planning. As the project manager overseeing this initiative, I need your expertise in outlining the key components of the business plan. Please define the target audience, identify the features and functionalities of the chatbot, outline the marketing and distribution strategy, estimate the budget and resources required, and set measurable goals and objectives for the project. The output should be a detailed business plan document with sections on executive summary, market analysis, product description, marketing strategy, operational plan, financial projections, and implementation timeline. Additionally, provide examples of similar chatbot projects for career planning, outline potential challenges and solutions, and suggest innovative features for differentiation.