He almost spent on ads. A mentor told him not to. Now he runs a 40-tutor agency.

In September 2023, Russell Greenhill's entire client list lived inside a single WhatsApp thread.

Sixty messages deep on a slow day. A parent's urgent request could disappear in the time it took to make a coffee. Russell describes it as constant firefighting, replying late, scrambling to remember details, hoping nothing slipped through.

He was a freelance tutor with one obvious next move: turn the freelance gig into an agency. Hire tutors. Take more clients. Stop being the bottleneck. The plan, in his head, was to fund that growth with paid ads.

He never ran the ads. Eighteen months later, Greenhill Academics has 40 tutors, five-figure months, and a website that grew traffic 5x without a paid campaign. The story of what changed is not a story about better marketing. It is a story about a single mentor session that pulled the ad plan off the table.

The chicken-and-egg every freelancer hits

Russell's problem looked like every other solo-to-agency problem. He framed it himself: "Do I get the tutors and not have any clients, or do I get the clients and not have any tutors?" Either way around, he'd look unprofessional. Either way around, he risked the reputation he'd spent years building.

Word of mouth had carried him this far. It would not carry him to forty tutors. Paying for ads felt like the obvious move, but he had no marketing experience, and burning runway on an experiment he couldn't evaluate scared him. He stalled.

He was working long hours wearing every hat in the business, tutor, marketer, admin, operations, and still felt like he was treading water.

Russell posted about the business on LinkedIn. Elisavet from GrowthMentor saw it, reached out, and suggested a different way forward than the one he'd been planning.

The session that pulled paid ads off the table

Russell booked a call with mentor Kevin Veitia, expecting to validate his ad plan. Kevin did the opposite. He didn't tell Russell to spend smarter on paid, he told him not to spend on paid at all. The growth channel for an agency at Greenhill's stage was relationships and partnerships, not impressions.

The grammar-school partnership was not a million-pound deal. It was a foothold. From there, momentum did the work it usually does: new partnerships brought new tutors, which brought new clients, which built the reputation that brought the next partnership. Growth came organically. The ad budget never moved.

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Three operational fixes after the pivot

A new growth channel only matters if the business underneath can hold the volume. Russell's couldn't, yet. The next ninety days were spent fixing the operational ceiling that would have broken him at twenty tutors, let alone forty.

The traffic numbers tracked the operational ones.

The £10,000 of consulting that came with a membership

Between Russell and Noah, his full-time associate since 2024, the team has booked dozens of mentor calls, strategy, operations, marketing, design. Russell estimates that buying the same hours of expert consulting on the open market would have cost roughly £10,000. He got it inside one flat monthly subscription.

Suggested mentors

These are the actual mentors who helped Russell build Greenhill Academics. The same ones are a click away:

Kevin Veitia

The mentor who talked Russell out of paid ads and into partnerships. Paid social, search, and growth strategy.

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Mischa

Helped Russell put in the CRM that cut dropped balls by 80%. Systems and operations for scaling teams.

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christopher silvestri

Built Russell's content engine, AI-assisted production included. Conversion copywriting and content strategy.

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Russell tells the whole arc himself in this short video:

Where Greenhill Academics is now

Forty tutors. Five-figure monthly revenue. A pipeline of school and partner relationships that compound rather than churn. Russell still tutors when he wants to, but the business no longer depends on him sitting at a desk replying to WhatsApp at 9pm.

His advice to other freelancers eyeing the agency jump leans on what worked for him, and pointedly not on the playbook he almost ran. "There are people with their fingers on the pulse in other industries, and tutors can apply those lessons to their own businesses. Look to industries that are more competitive."

Three things he'd hand to past-self

• Test the channel before you fund it. Russell almost spent on ads because they felt like the obvious move. One conversation revealed a cheaper, slower, compounding channel. The expensive thing isn't the ad spend, it's the months you lose validating the wrong assumption.
• Fix the inbox before you scale the team. A WhatsApp thread can run a freelance practice. It cannot run an agency. The CRM and the VA were the boring moves that made the 40-tutor headcount possible.
• Make the pie bigger. The mentors who helped Russell weren't paid per session. The schools he partnered with weren't competitors. The abundance posture isn't a slogan, it's how he found every door that opened.

What began as Russell tutoring on his own has grown into an agency with 40 tutors and a steady flow of students. More than just advice, GrowthMentor gave him the network and the belief to build something that once felt out of reach.

The throughline of Russell's eighteen months isn't a marketing story. It's what happens when a freelancer stops trying to fund the next stage of growth and starts asking whether the channel he picked is the right one at all.

Mentors who've helped founders make the leap

Russell almost funded the wrong channel.
A mentor caught it. One could catch yours.

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