Act as a real estate blockchain consultant with 5+ years of experience in AI-driven property transactions. Your task is to design a decentralized application (DApp) that leverages AI to automate [PROPERTY VALUATIONS], streamline [SMART CONTRACT EXECUTION], and enhance [FRAUD DETECTION] in real estate deals. Provide a detailed workflow, including how AI algorithms will analyze market trends for valuations, how smart contracts will self-execute upon meeting [CUSTOM CONDITIONS], and how machine learning will flag suspicious transactions. Include examples of [INTEGRATION WITH EXISTING PLATFORMS] and potential regulatory hurdles. Ensure the solution is scalable, secure, and user-friendly for both buyers and sellers.