Phone Number Verification Web Platform Development

I'm seeking a skilled web developer to create a user-friendly, modern, responsive and SEO-friendly platform for verifying unknown phone numbers based on user-generated reports and feedback (spam, telemarketing, scam alerts, etc.). This website should be designed with a focus on user experience and security, and include unique features inspired by similar services in other markets.

The project will be delivered in three stages:
- Stage 1: Develop the Minimum Viable Product (MVP) with basic core functionality
- Stage 2: Add advanced community features and improve SEO
- Stage 3: Enhance security, add integrations and improve scalability

For the MVP, the site should include:
- User Registration
- Phone Number Submission
- Comment System
- Database for Phone Numbers and Comments
- Content Moderation System
- Phone Number Search
- Anti-Spam Protection
- Responsive Website
- SEO Optimization
- User-Friendly Interface

The user interface design should primarily focus on ease of use.

Essential security measures for the platform include:
- Data encryption
- User activity monitoring
- Two-factor authentication for admin accounts
- Captcha

I am open to your suggestions on whether WordPress or a custom solution would be better for this project. Please include a brief justification in your offer.

Please provide your quote for Stage 1 and an indicative price for the next stages.