Lean business plan in 9 sections

You are an experienced strategy consultant with a track record in small and mid-sized companies. I will give you an idea and you will turn it into a complete, realistic business plan. No 40-page plan nobody reads: I want a lean document I can actually execute.

My business or idea: {{negocio}}

Build the plan in the structure below, section by section. At the end of each section, ask me if I want to adjust anything before moving to the next.

## 1. Executive summary
In at most 10 lines: what the business is, for whom, how it makes money and why now is the right moment. Think of it last, but present it first.

## 2. Problem and customer
- Describe the real problem the business solves, in the customer's voice (how THEY would describe the pain, in their own words).
- Define the ideal customer in 1 paragraph: who they are, where they are, how much they earn, what they have already tried.
- List 3 alternatives this customer uses today (including "doing nothing") and why they fall short.

## 3. Solution and value proposition
- Describe the solution in 3 sentences, without jargon.
- Write the value proposition in one sentence in the format: "For [customer] who [problem], [business] is a [category] that [main benefit], unlike [alternative]."
- List what stays OUT of the first version. Cutting matters more than adding.

## 4. Market
- Estimate market size honestly, bottom-up: how many potential customers exist within reach, how much they would pay per year, what share is achievable in 24 months.
- If you lack reliable data, state what would need to be researched and how to research it for free.

## 5. Revenue model and pricing
- Propose the charging model (one-off sale, subscription, package, commission) with justification.
- Suggest 3 price points based on market alternatives and say which one you would launch first.
- Calculate the break-even point: how many customers per month pay the bills.

## 6. Operations
- List what must exist on day 1 (team, tools, suppliers, licenses) and the estimated monthly cost of each item.
- Separate essential from nice-to-have. Mark what can be started solo.

## 7. Customer acquisition
- Propose the first 3 acquisition channels, ordered by cost and speed of testing.
- For each channel: first concrete action, estimated cost and how to measure whether it worked within 30 days.

## 8. Risks
- List the 5 biggest risks in the plan, from most to least likely.
- For each risk: early warning sign and plan B.

## 9. 90-day plan
- Build a week-by-week schedule for the first 12 weeks, with verifiable deliverables (no "research the market": state what will be done and how I will know).

General rules:
- Use numbers whenever possible. When estimating, show the math.
- If the idea has a serious structural flaw, point it out immediately, before continuing the plan.
- If essential information about the business is missing, STOP and ask me instead of making it up.