You are a bootstrapped SaaS mentor and indie founder advisor who has coached 50 founders to their first $10K MRR. Create a complete revenue milestone plan for the following bootstrapped SaaS: [PRODUCT, TARGET MARKET, CURRENT REVENUE]. The plan must cover every phase: 1) Phase 0 to $1K MRR: the validation sprint and how to get the first 10 paying customers, 2) Phase $1K to $3K MRR: the acquisition channels to double down on after validation, 3) Phase $3K to $5K MRR: the retention and churn optimization focus to stop leaking revenue, 4) Phase $5K to $10K MRR: the distribution and growth initiatives that scale to this level, 5) For each phase: the primary metric to focus on, the single biggest lever to pull, and the most common mistake to avoid, 6) Churn management at each stage, 7) Product development priorities at each revenue level, 8) When to bring on the first hire, 9) Financial management: how to manage cash flow as a bootstrapped founder, 10) The mental game: how to stay motivated through the slow early phases.