The dividend discount model (DDM) is most appropriate because:

• The company has started paying dividends (DDM requires dividend payments)
• The CEO expects constant growth in the future (DDM assumes constant growth)
• The company has limited trading history (IPO was only 6 months ago), making CAPM/Fama-French less reliable
• The bond yield plus risk premium approach requires reliable debt data, which may be limited with only one private placement bond

DDM is well-suited for companies with stable dividend policies and predictable growth patterns.