Comprehensive Hubspot CRM & Sales Hub Setup

I need a seasoned Hubspot expert to help me implement Hubspot from scratch, with a focus on the CRM and Sales Hub.

Specific Features:
- Lead Management: A critical component of this project. We want to capture, organize, and track leads efficiently.
- Invoicing: Implementation of this feature in the Sales Hub is essential for us.
- Twilio Integration: We require seamless integration with Twilio for our communication needs.
- Custom Objects Definition: We need help defining our custom objects within the Hubspot environment.
- Subscription Guidance: Expert advice on which Hubspot subscription to acquire based on our needs.

Ideal Skills:
- Extensive experience with Hubspot, particularly the CRM and Sales Hub.
- Proficiency in setting up lead management systems.
- Knowledge in implementing invoicing systems within Hubspot.
- Experience with Twilio integration.
- Capability to define and create custom objects.
- Ability to provide strategic advice on Hubspot subscriptions.

Please provide a detailed proposal outlining your relevant experience and how you plan to execute this project.