The other weekend I went on a little permaculture farm tour which was $10 per person. There were at least a dozen people so the farm owner made $120+ for an hour's work and no expense. That's not a bad wage in my book.

If one were able to generate enough interest in the farm to give a tour once a week that would be a nice little side income and help spread ideas about permaculture. Since the owner was not "teaching permaculture" but just showing what she was doing with it, no certification was needed.
Topics on the tour were:
Rainwater harvesting
Greywater
Composting toilets
General composting
Perennial food plants
Geothermal heating and cooling
Keyhole gardens
Mulching
Chickens
Alternative housing/yurts
Worm composting
Drip irrigation
Permaculture ethics
Global climate change effects on the region
...and probably some I'm forgetting!
Unfortunately the farm is closing this year, the property having been sold.

But it has inspired me to work toward developing something worth showing off.