The accumulation of capital for a project requires a developed funding approach. It includes the following components: the identification of the capital sources, sources of repayment of capital costs, and the legal person responsible for project financing. Scientists and researchers use other terms instead of the ‘funding approach’. Yescombe [4] used the terms ‘PPP models’ and studied purely private financing for the project (project or corporate financing) or alternative PPP models with private and public funding. Delmon [6], Daderkina [7] and some other scholars used the term ‘sources of financing’ and highlighted three of the most common sources of financing for infrastructure projects, such as Government financing, Corporate financing, and Project financing . Researchers from Public–Private Infrastructure Advisory Facility1 (PPIAF) analyzed methods to finance public service infrastructure.