This study investigates the feasibility of investing in the lamb abattoir business in Geraldton, Australia, utilizing two widely used investment evaluation methods: Net Present Value (NPV) and Internal Rate of Return (IRR). Data were collected through the analysis of historical financial reports, in-depth interviews with stakeholders, and a review of industry literature and government publications. Five-year cash flow projections are used to calculate NPV and IRR, considering external factors such as market price fluctuations and government policies. The investment analysis results show that the NPV method yields a value of AUD 3,741,422, while the IRR is 47.1%. These results suggest that, while both methods indicate investment feasibility, the NPV method provides greater accuracy and flexibility in assessing project risk and absolute value. The findings underscore the importance of choosing suitable evaluation methods for sustainable and well-informed investment decision-making. This study provides in-depth insights for investors and stakeholders in the agribusiness sector and highlights the need for effective risk management.