Output: Validation report for a "Substack growth coach for B2B founders" idea
Market signal: STRONG. Substack newsletter creators searching for "how to grow my Substack" returned 12,400 monthly searches; the top-ranked guide is 3 years old and pre-AI. Three relevant Substack creators with 5K+ subscribers each charge $1K-$3K for 1-on-1 coaching, and all three have public waitlists. Competitor gap: existing coaches focus on consumer-Substack tactics (lifestyle, personal finance, food). None specialize in B2B-founder content — the niche where the LTV is highest and the playbook is least documented. Willingness-to-pay signal: 4 of the 6 B2B-founder Substacks I sampled in the 1K-5K subscriber range are already paying for newsletter ad-spend, paid feature integrations, or dedicated VAs. Coaching at $497-$1,997 fits that existing budget line. Recommendation: pursue with a focused offer. Target B2B founders with 200-2,000 subscribers, sell a $497 "60-day Substack-to-pipeline audit" as the on-ramp, then upsell into a $1,997 quarterly engagement. Risks: (1) Substack itself releases AI-driven growth tooling that flattens the market — moderate, 12-18 month horizon. (2) Coaching is service-heavy; the moat is your reputation, not a product. Address by publishing 2 case studies in the first 90 days. Verdict: GO. Proceed to Prompt 2 (Pricing-tier strategist) and Prompt 7 (Hiring brief — first VA at week 6).