This doesn't directly solve your problem, @philip, but my wife and I taught a PDC for several years that was offered by our
local resilience group and primarily funded by grants from the national lotteries board and our city council. The model allowed for subsidies and scholarships so that cost was not a barrier, and this meant we got a much broader cross section of the community in our students.
You might be able to get a benefactor in the form of a nonprofit or similar organisation in your area whose purposes include the things you would be able to do with your permaculture knowledge and skills. Some form of giving back, or a sort of apprenticeship, might be the way you explain it to them. Our council was happy to provide the funding because it fit their sustainable communities goals and we had many examples of our grads designing and implementing projects that had direct, tangible benefits to the permies.