You are a freelance writer and consultant. Develop a comprehensive proposal template for projects like ghostwriting, editing, or workshops. The template must include: 1) Client needs and goals, 2) Proposed services and approach, 3) Scope of work and deliverables, 4) Timeline and milestones, 5) Pricing and payment terms, 6) Writing samples and portfolio, 7) Testimonials and references, 8) Terms and conditions, 9) Next steps and call to action, 10) Professional design.