This paper presents a simulation approach to analyze the rental housing supply chain's inventory problem. Unlike most products, the rental housing unit is a "circulation type" product, and the inventory problem is complicated. In this paper, a systematic and flexible process is proposed that efficiently provides critical decision-making support to managers to help them understand and validate the inventory problem in the rental housing supply chain. The proposed procedure considered inventory impact factors, such as the forecasting method, the lead time, the initial inventory level, and the inventory filling indicator. In addition, the procedure is applied to an actual rental housing supply chain to confirm its effectiveness. Furthermore, the proposed method was found to be both practical and powerful in assisting managers with their continuous decision-making efforts.