Sounds like you only do DD that is convenient to yourself...A Simple call to an MMJ Doctor and donation of the weed you purchase to a patient would make all the doubters look Golden.
You could ALL chip in the money to buy a $20 bag of Kush...Including the doctors fee ,my guess is that the total would come to $200...You could split that bill amongst yourselves, bringing that cost down.
It's the most OBVIOUS Act of DD that a doubter like yourself could do......but you just won't.