Resolve WordPress 404 Errors

I’m seeing more than 4,000 hits on “Page Not Found” screens across three separate WordPress sites. Using Google Analytics, I can pinpoint traffic patterns but I need a full-scale fix that eliminates these errors and keeps future visitors on the right path.

Scope of work
• Crawl all three sites to locate every broken URL that currently returns a 404.
• Map and implement 301 redirects to the most relevant live pages so equity and rankings transfer cleanly.
• Audit the sites for faulty internal links, update or remove each one, and confirm no new errors appear.
• Check external sources—including Pinterest pins, indexed Google results, and any high-volume referrers—for outdated links, then create redirects or request updates where feasible.
• Generate and submit a fresh, error-free XML sitemap to Google Search Console and Bing Webmaster Tools.

Acceptance criteria
• Google Analytics and any crawler (e.g., Screaming Frog) show zero unresolved 404s after deployment.
• Redirects return proper 301 status codes and avoid redirect chains.
• Updated sitemap is indexed without warnings in Search Console.

Please outline the method you’ll use (plugins, server-level rules, or a combination), a realistic timeline, and a fixed price for completing the task. I’m ready to move quickly once we agree on the approach.