Providing compensation for community participants is a great idea. I'm not exactly sure what the workshops entail, but you may be able to find grants through a local community foundation or other foundations focused on equity, empowerment, and community organizing. Would it be possible to expand the workshops to include leadership training or training in community organizing, so that community members come away with their involvement with meaningful skills that they can use in the future to improve their communities? That might be a way to attract funding to the work you are doing. Good luck.
Gabe Kuperminc