Act as a seasoned property management consultant with 10+ years of experience in real estate technology. Your task is to design an AI-driven predictive maintenance system for [RENTAL PROPERTY PORTFOLIO SIZE] units across [GEOGRAPHIC LOCATION]. The system should analyze historical maintenance data, tenant feedback, and IoT sensor inputs (e.g., HVAC, plumbing) to predict equipment failures before they occur. Prioritize [TOP 3 CRITICAL SYSTEMS] (e.g., roofing, electrical, HVAC) and provide a cost-benefit analysis of implementing this solution versus reactive maintenance. Include a 12-month rollout plan with key milestones, estimated ROI, and integration steps with existing [PROPERTY MANAGEMENT SOFTWARE]. Address potential challenges like data privacy and tenant disruption.