Excel Revenue Forecasting Workbook Creation

I need an Excel-based workbook that turns my raw sales figures and assumptions into a clear, quarterly revenue forecast.

Key Requirements:
- Fully editable model with a dedicated Input sheet (historical data, growth assumptions, pricing changes, seasonality factors).
- Dynamic calculation sheets that generate the projected P&L by quarter for at least the next three years.
- At-a-glance dashboards (charts, variance bars, conditional-format heat maps) so stakeholders can read the numbers easily.
- Clear documentation inside the file: named ranges, brief comments, and a quick user guide tab.
- The framework should be expandable later to monthly or annual views without rewriting everything.

Skills Required:
Advanced Excel (INDEX/MATCH, dynamic arrays, Power Query), Financial Modeling, Data Visualization, and Business Analysis.

Please send a short note on how you would structure the workbook, any similar models you have built, and your estimated timeline.