The use of ICTs in fostering development in marginalized communities is proliferating, across many underdeveloped communities. This is made possible through the availability of funders who support projects at a foundation level, in an effort to encourage communities to join in the development process. Nevertheless, most of the projects fail to reach full maturity and are not self sustainable due to lack of generated revenue to support their day to day expenses. This paper looks into measures to be put in place to ensure sustainable development of Information and Communication Technology for Development (ICT4D) projects in marginalized communities of rural South Africa. It highlights the current financial state of the Siyakhula Living Lab initiative in the area of Dwesa, in the Eastern Cape Province. Dwesa is a rural community located in the Wild Coast of the former homeland of Transkei, in the Eastern Cape Province of South Africa. The paper also addresses the issue of billing schemes to be employed in the revenue generation models within the Siyakhula Living Lab system. While convensional billing schemes have been, and are being used in billing procedures, we argue that these billing schemes might not be the most applicable ones in rural areas as a result of cultural and demographical differences. Therefore, we suggest the inclusion of context-sensitive billing schemes for marginalized communities. These are billing schemes that include non-conversional billing matrices such as financial capacity of individuals, age, disabilities, amount of support work done for the project and number of dependents.