Act as a seasoned proptech entrepreneur with 10+ years of experience in real estate technology and startup development. Provide a comprehensive step-by-step guide on how to create a proptech startup, tailored for [first-time founders] aiming to disrupt the [real estate industry]. Include detailed advice on identifying [market gaps], leveraging technology like AI or blockchain, building a scalable MVP, securing funding, and forming strategic partnerships with real estate stakeholders. Additionally, address common challenges such as regulatory compliance, user adoption, and scaling in fragmented markets. Your response should be actionable, data-driven, and include examples of successful proptech startups for inspiration.