A senior strategy consultant from a top firm bills somewhere between $400 and $1,200 an hour. A six-week engagement to validate a single business idea will land you a bill in the five-figures, easily six. For most founders — especially in SMB, bootstrapped, or pre-seed land — that is not a number. It's a fantasy.
And yet the work consultants do isn't magic. It's structured scepticism, applied in the right order, by people whose job is to ignore your enthusiasm and look at the parts of your idea you'd rather not look at. You can do that yourself. Most founders never do, because nobody handed them the playbook.
Here is the playbook.
Consultants charge $400/hour to ask uncomfortable questions. This guide teaches you how to ask the same questions yourself — and what to do with the answers.
Why founders skip stress-testing (and pay for it later)
Stress-testing your own idea feels disloyal. You've spent weeks falling in love with it; now you're meant to attack it? Most founders flinch — and then spend the next eighteen months learning, in public and at full cost, what one honest afternoon would have told them.
The fix isn't more discipline. It's the right lenses: each lens is a different person you imagine in the room, and each one cares about a different way your idea could fail.
The 7 lenses every idea needs
These are the seven perspectives a good consulting team will quietly cycle through in their first week. Run your idea past each one in turn. If you can't answer their first question without flinching, you have your homework.
1. The Economist — does this actually make money?
Forget revenue. The Economist asks for contribution margin per unit. What does it cost you, fully loaded, to deliver one of the thing you sell? What do you charge? What is the gap, in cash and in percent? How does that gap behave at 10× and 100× volume?
If you can't answer that in numbers a 12-year-old would understand, you don't have a business yet — you have an aesthetic.
2. The Lawyer — what are you signing up for without realising?
Who owns the IP? Are co-founders on a written agreement with vesting? Are contractors assigning IP in writing? Is what you're doing regulated (financial services, health, data, employment classification)? What contracts will you need before you need them — Terms of Service, DPA, MSA, SAFE, SHA?
3. The Customer — would the buyer actually buy?
Not "would they like it." Would they pull out a credit card, push it through procurement, displace an incumbent, and tell their boss? The Customer lens is the most under-used and the most useful, because it's the only voice in the room that has the wallet.
4. The Operator — can you actually build the machine?
Strategy is what you'd do; operations is what you actually do on Tuesday morning. What's your hiring sequence? What's the weekly cadence? Where is the bottleneck (it is almost always you)? Which processes have to exist before scaling kills you?
5. The Skeptic — what are the strongest reasons this fails?
Run a pre-mortem: it's now 18 months from today and the company is dead. Write the post-mortem. What killed it? Founders who do this consistently catch between two and four existential risks they were quietly minimising.
6. The Storyteller — can you explain it in one sentence?
If your pitch needs three slides of context before the punchline, nobody will repeat it. The Storyteller lens forces compression — which forces clarity, which usually exposes that the actual idea is either weaker or stronger than you thought.
7. The Psychologist — what need is this really meeting?
For your customer: what emotional job is the product doing — status, belonging, control, escape, identity? For you: what need is building this company meeting in your life? Founders who don't know the answer to the second question burn out faster.
How to actually run the test (in one afternoon)
- Write a single paragraph describing your idea. No more than 120 words. If you can't, that's signal #1.
- For each of the 7 lenses above, write the lens's first question at the top of a page. Just the question, not your answer.
- Spend exactly 20 minutes per lens answering as honestly as you can. Set a timer. Don't be clever; be specific.
- At the end, mark each answer red, yellow or green based on how confident you are.
- Anything red is a kill-or-fix item. Anything yellow needs a real experiment, not more thinking. Greens you can move on from.
When DIY stops being enough
If your reds cluster around regulatory exposure, capital structure, or anything where being wrong costs more than the cost of advice — that's when you actually do hire the specialist (and you'll know exactly what to ask, which makes them much cheaper).
For everything else, the playbook above is roughly 80% of what a $50,000 engagement gives you. The difference is mostly polish, neutrality, and a slide deck.
A faster way: simulate a full advisory board
The hardest part of doing this yourself isn't the framework — it's playing the parts. It's genuinely difficult to be the Lawyer, the Economist and the Skeptic at 11pm when you're already tired and emotionally invested.
That is exactly the problem THE ROAST exists to solve: 30+ archetypal advisors, each one ready to apply their lens to your idea on demand, with a tunable level of bluntness. It is the cheapest possible advisory board, and the only one that's available at 3am.