Professional Networking & Membership Site with Membership Features

I'm seeking a cost-efficient website developer to create a service-oriented site for a professional association membership business targeting. The site must support membership maintenance and include a subscription-based payment backend.
Currently have VPS server wordpress website with uploaded theme with no backend. But open to try more sophisticated format.

Required Membership Features:
- Profile management
- Member dashboard
- Member-only content
-Publications updating features
-Events updating features
- Subscription payment
- Tiered services
- Newsletters and subscription capture integration
- CRM integration
- Events marketing
-Social media (Twitter /linkedin) embedded posts widgets for news updates

Essential Subscription Payment Features:
- Recurring billing
- Multiple membership tiers

Ideal Skills and Experience:
- Proficiency in web development, especially for service-oriented sites
- Experience in setting up membership sites with the specified features
- Strong background in subscription payment systems
- Familiarity with CRM and events marketing tools

Please provide examples of similar work and a detailed proposal.