I've thought about this a lot over the past 6 months since I quit smoking & started vaping.
I figure, here in Ohio, I was buying the bargain cigs, but they still cost about $6.25 USD per pack. I could easily smoke 1.5-2 packs, or $8-10 on cigs daily.
So, in the last 6 months (almost exactly), I would've spent roughly [180 days x $8/day = $1440 USD] a lot of money.
Even with buying several mods, accessories, juice, coils, cotton, tools, everything... there's no way I have serpent that much on vaping. I figure it's closer to maybe,
maybe $500. I feel that's a pretty accurate guess, maybe plus or minus $100. So $600 at most, which is less than half of what I spent on cigs in that same amount of time in the past.
I'm so grateful; I don't cough any more, I feel so much better, & my voice & singing voice are much, much improved.