Build 15–20 Private Blog Network (PBN) Sites for SEO & Website Ranking

I'm looking for an experienced SEO professional or team to build a Private Blog Network (PBN) consisting of 15 to 20 high-quality sites to support and rank my main website.
Candidates should have a proven track record in PBN strategies, including domain authority checks and site management.

Scope of Work:
Create 10–20 niche-relevant PBN websites

Each site must have:
WordPress installation with custom design
High-quality hosting (different IPs & DNS to avoid footprints)
SEO-optimized, niche-relevant content
Essential plugins (security, caching, SEO tools)
Clean layout & logo (look like real blogs)
Safe and natural outbound linking strategy
Google indexing

Goal:
To build a strong, clean PBN that helps improve search engine rankings for my main website through safe, contextual backlinks.

What I Expect from You:
Research suitable domains and check
Experience building and managing PBNs (share examples if possible)
Strategy to avoid footprints & penalties
Recommendations on domain sourcing
Transparent reporting and progress updates

Budget:
Please provide a cost per site and total cost for 15–20 PBNs
Include estimated timeline and maintenance options (if available)

Possibility of long term collaboration: