Construction Estimating & Developer Spreadsheet (Residential Housing)

I need a developer-level construction estimating spreadsheet for residential housing projects. This is not a simple materials list. The spreadsheet must help evaluate deals, control budgets, track timelines, and protect profit.

Requirements

The spreadsheet must include:
• A deal snapshot showing total cost, profit, margin, and break-even price
• A land cost breakdown (purchase, legal, permits, site prep)
• A structured construction estimate by category (earthworks, foundations, structure, roof, MEP rough-in, finishes, external works, contingency)
• Ability to input quantities, unit costs, labor vs materials, and roll up to cost per m²
• A simple timeline / schedule (spreadsheet-based)
• Cash flow awareness and budget vs actual tracking
• Clear logic showing how changes affect profit

Experience Required
• Real experience with construction cost estimation (residential preferred)
• Strong Excel or Google Sheets skills
• Understanding of contractor pricing, scope, exclusions, and change orders
• Ability to explain the estimating logic (walkthrough or short call preferred)

This is not a simple materials list.
I need a decision-making system used by professional developers to evaluate land, control budgets, manage timelines, and protect profit.
Requirements:
- User-friendly interface
- Ability to input and update costs
- Categories for materials, labor, and equipment
- Detailed itemization for each category

Ideal Skills and Experience:
- Experience with construction cost estimation
- Proficiency in spreadsheet software (Excel, Google Sheets, etc.)
- Attention to detail and accuracy