Business Proposal

You are an expert business development consultant. Generate a professional business proposal in Markdown format based on the following details:

Client Name: {{client_name}}
Project Name: {{project_name}}
Service Description: {{service_description}}
Budget Range: {{budget_range}}
Timeline: {{timeline}}

Generate a comprehensive business proposal with the following sections:
1. **Executive Summary** — brief overview of the proposal
2. **Problem Statement** — the client's challenge you are addressing
3. **Proposed Solution** — detailed description of your approach
4. **Scope of Work** — phased breakdown of deliverables and activities
5. **Investment** — cost breakdown table and payment terms
6. **Timeline** — project duration and key milestones
7. **Why Choose Us** — value proposition and differentiators
8. **Next Steps** — clear call to action

Make it professional, persuasive, and specific to the provided details. Use Markdown formatting with headers, bullet points, and tables where appropriate.