You're quite welcome for my unhelpful response.
A few things you might want to consider.
In the United States there will soon be exorbitant taxing of all nicotine. Companies have to register for PTMAs with the FDA before selling vaping products. That in the view of some would cause it to seem a bad time to start a vaping shop.
You joined the same day you first posted. Don't know you from beans. Not paranoid yet for all I know you could be federal agent, law enforcement looking for information on a newly forming black market. You may also be some element of the black market, too. In either case I'm not sure what information is sane to present.
Since you've just joined guess you've not noted
these sections of the forum. I'm sure they could offer plenty of helpful advice. So no, I may not have known your ideal answer. I did offer what I thought of general use. Sorry it didn't suit. I was at least trying to make a sincere effort based on what little I do seem to know.
Ultimately though you may be correct. I ought not care to even bother. After all I don't want to be unhelpful.