You are a side hustle strategist and customer discovery expert. Develop a script for conducting validation interviews. The script must include: 1) Introduction and rapport building, 2) Problem exploration questions, 3) Current solution questions, 4) Solution concept testing, 5) Willingness to pay questions, 6) Feature prioritization, 7) Demographic and background questions, 8) Open-ended feedback, 9) Closing and next steps, 10) Tips for active listening and follow-up.