New business ideas: $20K slapping MacBooks, $1K/mo passive printables, $300/day fridge rentals 🤑

$5K in 3 days with an AI app that moans when you slap your MacBook. Yep.

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Business Ideas Newsletter



Hey, it's Niall 👋

Fun bit of perspective: in the early 1950s, a computer played its first game of checkers. It wasn't very good – but it was the world's first AI program.

Seventy-odd years of invisible progress later, AI diagnoses diseases, runs supply chains, writes code, and creates Renaissance portraits of your cat.

To most people, it feels like the whole thing appeared overnight in 2023. In reality, it was decades of quiet compounding.

And now it's moving in months, not years. Tools that were cutting-edge a year ago are already just the starting point.

Which makes me wonder – what's quietly building right now that'll seem like it "came out of nowhere" in a few years?

I guess we'll find out 👀

Alright, keep scrolling for my latest batch of fresh business ideas.

Niall DohertyNiall Doherty
eBiz Insider

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BORING BUSINESS

$300+/Day Renting Refrigerated Trailers

When a restaurant's walk-in cooler dies, they need a replacement yesterday.

That's a business opportunity: buy an insulated trailer with a freezer unit, rent it out in emergencies 🚨

A rental business insider with 200+ clients in the space shared the concept on Reddit.

The comments from actual customers backed it up 👇

When my commercial kitchen needed to replace a walk in cooler, I called everyplace within 50 miles of me and not one rental company had an available trailer to rent.

A food truck owner chimed in...

I've paid $800 for a weekend rental once a summer for five years when my food truck is at a festival we can't leave from.

Five summers running from a single customer 🤑

Startup cost is $25,000 to $45,000 for one trailer. Rates range from $130/day for smaller units up to $400/day in bigger markets.

But emergencies aren't the only market. One operator had two trailers rented to the military for 8 to 12 months straight 👀

Customer acquisition is surprisingly simple – a website, a Google Business listing, and some Google Ads. Emergency customers are Googling, not browsing.

Can't afford the upfront cost? Find an investor to fund the trailer while you provide the "sweat equity." Split profits until they've doubled their money 😎

ETSY SIDE HUSTLE

$1K+/Month Selling Simple Printables (Pretty Hands-Off)

Examples for “spring cleaning checklist” on Etsy

Chelsea Shelton is a former elementary school teacher who started selling digital printables on Etsy during maternity leave.

Her first product was a simple spring cleaning checklist designed in Canva 😎

First sale came within 5 days.

She now has over 700 products and earns $1,000 to $1,200 a month – largely on autopilot 🤑

Her biggest early mistake was making products she personally liked. The shift that changed everything was following what people were already searching for.

Her research process 👇

  • Type a keyword into Etsy's search bar – the autocomplete shows what buyers want

  • Use tools like E-Rank and Everbee to validate demand

  • Sweet spot: 4,000 to 6,000 monthly searches, under 20,000 competing listings

  • Niche down hard – "ADHD spring cleaning checklist" beats "spring cleaning checklist"

Simple printables sell for $1.50 to $5. Editable or fillable versions go higher. A year-round "buy 3, get 25% off" deal boosts her average order value 🚀

About 25% of her income comes from Teachers Pay Teachers – selling the same products to a different audience.

Will AI soon kill this kind of business? 🤔

Chelsea doesn't think so – most buyers aren't going to mess around with prompts. They want the finished product, ready to print.

Seasonal printables are the real play here. Create them once, they sell again every year 🥳

QUIRKY APP

$5K in 3 Days From a Ridiculous Vibe-Coded App

📝 A guy named tonnoz posted a simple Instagram reel – reviewing a free GitHub project that makes ridiculous sounds when you slap a MacBook.

It went viral.

Comments were all "WHERE IS THE APP" "I NEED THIS" over and over.

So I built it.

48 hours later, SlapMac was live – a $5 app with 130+ sound clips across seven voice packs.

Slap your MacBook and it screams, moans, or yells "ULTRA COMBO!" depending on the pack 😂

He skipped the Mac App Store entirely and self-distributed from his own website...

no approval process, I am self distributing. Apple would have killed all the momentum

$5,000 in the first 3 days.

10 days in, that number hit $20,700 🤑

About half of all downloads convert to paid. He's since raised the price to $7 and added a "USB Moaner" mode – plug in a USB device and your MacBook reacts.

tonnoz is a software engineer, but he vibe-coded SlapMac in 2 days with AI and now...

I'm reconsidering my whole career.

The app concept already existed as a free GitHub project. tonnoz just spotted the demand in the comments and shipped a polished version in 48 hours.

Your turn: scan trending content for "I NEED THIS" comments, then move fast 🔥

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