Seeking Flexible Project Consultation

I have a concept in mind but still need help turning it into a concrete brief. I want to walk through my ideas with someone who can quickly understand ambiguous requirements, ask the right questions, and translate the conversation into a clear, actionable roadmap... (Budget: $250 - $750 USD, Jobs: Agile Project Management, Business Analysis, Business Development, Business Strategy, Consulting, Content Strategy, Project Management, Technical Writing)