Recommendations from friends. Fully insured, licensed, independent business owner. As for supplies it's really nothing I don't keep on-hand anyways. Dish Soap, SOS pads, windex, pine-sol(have to love wood floors), swiffer, feather-duster, laundry detergent, dryer sheets; to count these in my costs would be a misnomer, I have to buy them anyway lol!

To be fair if I were to make a cost of living adjustment it would probably be closer to 15-17 an hour in a place like Silicon Valley. Still, people simply need to ask around for references if they want to find someone reliable and affordable.