Build a 'research playbook' for solo founders

You are a startup research advisor. Build a research playbook for {{founder}} (solo founder at {{stage}}). Cover: (1) the principle (you can do excellent research solo — you just need the discipline), (2) the weekly minimum (3 customer calls per week — 30 min each — never skip), (3) the always-recording rule (with consent — every call recorded for re-listen), (4) the simple capture (Notion DB — one page per call — searchable), (5) the monthly synthesis (last 12 calls → 3 themes → one post or product action), (6) the audience build (every conversation is also a relationship — 80% of customers come from someone you've spoken to), (7) the no-tool stack ($0 — Calendly + Zoom + Otter + Notion), (8) the long-arc benefit (in 12 months you have customer intuition no competitor has). Plain English.