Business Model — The Bootstrap Flywheel

Source: Business-Plan.md (v1.0) + interactive revenue-model.html. Summary; raw docs are canonical. Cost numbers are research-checked [FACT]-ish; conversion, CAC, retention, WTP are [ASSUMPTION] — the cheap launch validates them.

The one rule

The value of a customer must exceed what it costs to acquire one. Contribution > CAC.

When it holds (cheap organic acquisition + high plan attach), the business is profitable from month one on $1,000. When it doesn't (expensive paid ads + low attach), it bleeds money it doesn't have. Everything else is detail.

The bootstrap flywheel

Start on $1,000, take no salary, reinvest everything. Each phase self-funds the next; never take profit to grow. - Phase 1 — Prove it (Weeks 1–8, budget = $1,000): personally make 1–3 stories; launch to own network + parenting/homeschool communities (near-zero CAC). Goal: make the $1k back; prove preview→paid ≥6% and contribution > CAC. - Phase 2 — Spin it up (Months 2–6, budget = reinvested revenue): more stories (catalog) + a small paid-acquisition test; launch the school-year plan. Goal: $1k → $10k/month. - Phase 3 — Scale reach (Months 6–18, budget = profit, rolled): full NGSS G1–2 catalog (~18 stories); scale via organic/viral/influencer + disciplined paid. Goal: $10k → $100k/month.

Revenue streams

Digital book · physical book · school-year plan (annual) · bridge pack. Gross margin ~78% [EST] — high because digital dominates. COGS drivers: AI generation ~$1.50/book, print ~$14, payment fees ~3%.

The three cases

Same price/cost structure; they differ only on the unproven drivers (CAC and attach are what flip the outcome).

Case	Customers by M12	Revenue (mo 12)	Net profit (mo 12)	Cash low-point	Profit/customer	LTV:CAC	First profitable month
Pessimistic	239	$1,086/mo	−$1,242/mo	−$10,964	−$43	0.6×	never (in 12 mo)
Realistic	603	$5,504/mo	+$1,084/mo	+$1,000	+$14	3.3×	month 1
Best	2,439	$49,210/mo	+$31,734/mo	+$1,000	+$61	19.8×	month 1

All figures [EST] (model output).

What separates them (the unproven dials)

Driver	Pessimistic	Realistic	Best
New customers, month 1	15	25	45
Monthly growth	5%	12%	25%
CAC	$70 (paid)	$35 (mixed)	$18 (organic)
Buy the plan	20%	35%	55%
Buy a physical book	15%	25%	40%
AI cost/book	$3.00	$1.50	$0.75

Why Pessimistic dies: a $70 paid CAC exceeds the ~$27 contribution → every customer loses $43 → you'd need ~$12k of capital you don't have. Realistic & Best win because contribution beats CAC. The lesson the model teaches: protect CAC (go organic) and drive plan attach.

What works / what fails

Works: low-cost organic acquisition (KiwiCo cut cost-per-customer ~40% with Reels [FACT]; referral ~25% below avg CAC); annual billing (cuts churn 60–80% vs monthly boxes [FACT]); curriculum-tied recurring need (Generation Genius ~70% renewal at ~5.4× LTV:CAC [FACT] — the closest economic twin); a recurring hero as a switching-cost moat; a narrow wedge; a reusable content library.

Fails (ranked killers): (1) CAC > LTV with no cheap channel — the #1 killer; (2) high churn (monthly boxes 10–15%/mo); (3) the content treadmill; (4) single-channel dependency; (5) paying for ads before PMF; (6) the one-off gift trap (Wonderbly hit a revenue ceiling → acquired); (7) undifferentiated "AI slop" + parent AI-distrust; (8) scaling before unit economics work.

Best-fit wedge

Gifting + summer/back-to-school timing, one grade (G1 or 2) science, sold to engaged parents via organic parenting communities + short-form video, digital-first.

Confidence & validation

Layer	Confidence	Validated by
Cost side (AI, print, fees, margin)	Medium-high	live POD quotes + a physical proof
Conversion, CAC, retention, WTP	Low — [ASSUMPTION]	Phase 1 launch (~8 weeks, ~$1k)

The bootstrap launch is the experiment. Known model gaps to close later: CAC rising with scale (named but not yet modeled as a curve), and seasonality in the monthly curve.

Related

• ADR-005 — Bootstrap + reinvest decision
• ADR-001 — Preview → purchase
• Research synthesis (the why)
• Pilot-only unknowns