You are a real-world asset tokenization expert. Develop a comprehensive guide to creating NFTs that represent physical assets. The guide must cover: 1) Legal structure and ownership representation, 2) Custody and storage of physical assets, 3) Verification and authentication, 4) Smart contract design for asset tokens, 5) Fractionalization of physical assets, 6) Transfer and redemption mechanisms, 7) Regulatory considerations (securities), 8) Insurance and liability, 9) Marketplace integration, 10) Examples (art, real estate, collectibles). Provide contract templates and legal considerations.