Salesforce Setup for Small Team

I need a basic Salesforce setup for 3 users. The system should be tailored to our immediate requirements but flexible enough for future expansion into marketing, pricing, and advanced reporting.

Essential Features:
- Customized stages for Lead, Opportunity, and Closed stages
- Basic reporting capabilities:
- Sales performance reports
- Pipeline reports
- Reports based on simple calculations derived from records
- Calculation fields:
- Total sales amount
- Average deal size
- Additional calculations to be discussed

Ideal Skills and Experience:
- Proven experience in setting up Salesforce for small teams
- Strong understanding of Salesforce customization, especially in creating stages and reports
- Ability to create calculation fields and discuss complex requirements
- Good communication skills for discussing additional calculations

Please provide examples of previous work and estimated timelines.