This document discusses sustainable financing options for cluster initiatives. It begins by outlining the typical financing structure in Europe, which includes baseline public support, membership fees, and EU project funding. It then examines a case study of an aviation cluster that lost public funding and had to transition to new sources. These included increasing membership fees, providing new fee-based services, and partnering with other organizations. The document also analyzes factors that influence financing like acquiring new members and clients, modifying fees, and developing various fee and non-fee services. Overall it promotes moving from sole public funding toward more diverse and sustainable sources like strategic projects and international initiatives driven by member demand.