4thline.ai
Case studies

Anonymized engagements.

Five proof cards. No client names.

01 / Meta Ads · Home services

Metro Detroit / Ann Arbor

  • 470 leads
  • $49.86 cost per lead (−28%)
02 / Meta Ads · Martial arts

Southeast Michigan

  • ~60–66 leads / week
  • ~$8–9 cost per lead
03 / Plumbing · Southeast Michigan

Southeast Michigan

When the owner left a franchise to run an independent plumbing company, they needed a brand and a demand engine from scratch.

We built a new website (launched April 2025), put baseline SEO in place, then ran Google Ads — and later Meta Ads. In mid-2026 we added six location pages for surrounding Downriver communities (Allen Park, Taylor, Southgate, Riverview, Wyandotte, Romulus).

Result: Google Ads overall CPA has run about $52–$76 per lead.

04 / SEO · Electronics

Michigan

  • 205 keywords on page one
  • 86 in position #1
  • 242 in the top two pages
05 / SEO · Sub-manufacturing

Michigan

  • 116 keywords on page one
  • 59 in position #1
  • 133 in the top two pages
  • #1 for core terms like Detroit kitting, Detroit subassembly, Romulus kitting

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