Jeffrey Castro
All work

How I build a sales funnel

A cold click becomes a tagged contact, a nurtured lead, and a booked call without anyone chasing it by hand.

A walkthrough of the build itself, not a single engagement. Client names and numbers go up here as clients sign off on them.

Service
Sales funnel build
What it covers
Landing page, booking step, nurture
Runs on
GoHighLevel + n8n

The system that got built

Paid traffic

Campaign tagged on arrival

Link in bio

Social profiles and posts

Existing list

Broadcast into the funnel

Landing page and opt-in

One offer, one action

Booking step

Straight after the opt-in, never a dead thank-you

Booked call in the pipeline

Owner and reminders attached

Nurture sequence

Email and SMS for everyone who did not book

The problem

Traffic lands on a page that asks for everything at once, so the people who are not ready today leave and are never heard from again. There is no second touch, no record of which ad brought them, and no way to tell a warm lead from a cold one, which makes the cost of a booked call whatever the last campaign happened to spend.

What I built

  • Landing page written and built around a single offer
  • Opt-in form posting into GoHighLevel with campaign tags
  • Thank-you step that pushes straight to booking
  • Calendar and reminder sequence wired end to end
  • Email and SMS nurture until the lead books or opts out
  • Pipeline stages mirroring the funnel steps
  • Every entry point tagged so sources can be compared
  • One call to action per page, with nothing competing

How it’s wired

  1. Land

    Traffic hits one page with one offer and one action; the entry point is tagged so each source can be judged separately.

  2. Convert

    The opt-in creates the contact in GoHighLevel and moves them straight to the booking step rather than a dead thank-you page.

  3. Loop

    Anyone who opts in but does not book enters the nurture sequence, which feeds them back to the booking step until they take it.

  4. Hand over

    A booked call lands in the pipeline with an owner and a reminder sequence already attached.

What you get

  • Every step wired to the next, with no dead ends
  • Booking and checkout connected to your calendar
  • The whole funnel living inside your GoHighLevel
  • GoHighLevel
  • n8n
  • Claude Code

Want this build?

Tell me what you're trying to build, and I'll tell you how to get there.

Get in touch

© 2026 Jeffrey Brian Castro. All rights reserved.