I think that figure of 8,000 is overly optimistic. I don't know the figure for total number of households in the district but guess it's around 35,000 so that's hoping around 1 in 4 will be paying.
28% of those households don't have a green waste collection at present so they'll have to be persuaded to pay for something they've never had.
We have a green waste collection and I estimate something like 1 in 10 regularly put bags out, often no more than 1 or 2 bags per house and then not every collection.
I'm tempted to ask was that figure the result of any surveys or is it wishful thinking plucked out of thin air?
