In this book chapter, we introduce the readers to typical sources of hotel financing using a hypothetical case-study. First, we provide a commentary on various types of funding sources. We provide rationale for why a particular surplus unit specifies certain constraints to an (investment) manager. A discussion is offered on various factors that may lead to a certain mix of financing. We walk the readers through various steps of the optimization process. Finally, we provide a case study on optimizing the funding sources using the SOLVER function in MS Excel.