Three businesses that work today.

We analyse them the way an investor would: what it costs to start, where the demand comes from and what can go wrong. No income promises.

See the three businesses

First, real demand.

A business only makes the list if customers already pay to solve the problem. If demand cannot be checked today, it is not on the list.

Customers already paying
Verifiable problem

Then, how much it can take.

Entry cost, margin, recurring revenue and the risk that technology or regulation changes. All three businesses are measured against the same limits.

Contained entry cost
Monthly revenue

And finally, the first step.

Every recommendation ends in something concrete to do this week, not in an idea. The rest gets adjusted with the first customers.

We would rather measure than promise.

Most lists of profitable businesses are written to win a click. They promise income, skip the costs and forget that most projects fail for the same reason: starting without customers.

We do the opposite. A few businesses, analysed from the inside, with what it takes to start, what usually goes wrong and why they make sense now. If a year from now they no longer do, they come off the list.

AI automation for small businesses

Setting up assistants, agents and automated workflows that take repetitive work off small firms: customer service, bookings, quotes and invoices.

Why now: only 13.4% of Spanish micro businesses use AI, according to the INE
Low entry cost: a computer, subscription tools and training
Recurring revenue: an initial setup fee and a monthly maintenance fee
Risk to watch: overpromising; start with one measurable process per client

AI video and ads for brands and shops

Producing videos, product photos and social ads with generative tools such as Higgsfield, for a fraction of the cost of a shoot.

Why now: 61% of small firms are trying AI in their advertising and half do not know which tool to use
Low entry cost: tool subscriptions and a portfolio of your own
Recurring revenue: monthly packages of social and campaign content
Risk to watch: image and brand rights, and disclosing the use of AI

Batteries for solar self-consumption: installation and maintenance

Adding storage to homes and businesses that already have solar panels, and looking after it. It is the fastest growing part of self-consumption.

Why now: 61% of new home installations in Spain already include a battery, according to UNEF
Medium entry cost: tools, a vehicle and the official installer certification
Recurring revenue: maintenance contracts and periodic inspections
Risk to watch: changes in subsidies and regulation; do not depend on grants

How we choose a business

Four filters, always in the same order. A business that fails one does not reach the next.

Verifiable demand

Customers who already pay today to solve the problem. We check live ads, quotes being requested and companies already billing in the sector.

Entry cost

What it costs to reach the first customer: tools, training, permits and months without income. If you have to borrow to start, it is out.

Margin and recurrence

What is left after costs, and whether the customer pays again the following month. We prefer small repeated fees to large one off sales.

Risks and plan B

What could break it: a regulation, a tool that raises its price, a large competitor. And what can be done if it happens.

What you need to get started

None of the three needs premises or a large investment at the start. They do need time, learning the trade and going out to find the first customers.

One to three months of practice before you bill
A first nearby customer to test the service with
A closed offer: what it includes, what it costs and how long it takes
Registering as self employed and, for batteries, the installer certification

Data

Why these three, and why now

Three public figures that explain the choice. They are not income forecasts: they describe the demand each business starts from.

Starting data

Micro businesses already using AI: 13.4%
Small firms trying AI in advertising: 61%
Self-consumption batteries in 2025: +65%

Sources: INE (Spanish Statistics Office), ICT use in companies, first quarter of 2025. Opinium for Amazon Ads, October 2025. UNEF, 2025 self-consumption report. Context figures only; they do not guarantee any result.

Frequently asked questions

Why only three businesses?

Because analysing properly takes time and a long list forces you to be shallow. We prefer a few, explained from the inside, and reviewed when conditions change.

Is any income guaranteed?

No. No business guarantees results. What we do explain is where demand comes from, what it costs to start and what usually goes wrong, so the decision is yours and based on data.

Which one suits me?

It depends on your experience, the time you can put in and the money you are willing to risk. Tell us in the form and we will point you to the one that best fits your situation.

Do I need to code to automate with AI?

Not to start. Current tools let you build assistants and workflows without code. What you do need is a clear understanding of the client process before automating it.

What does it take to install batteries?

It is a regulated trade: you need the electrical installer certification and must follow the low voltage regulations. Of the three, it asks for the most training and investment, and it also has the least competition.

How often is the list reviewed?

Whenever the underlying data changes: demand, regulation or tool prices. If a business stops making sense, it comes off the list and we explain why.

Contact

Let us talk

Tell us about your situation: experience, time available and which of the three interests you. We reply within 24 working hours, with no obligation.