I think it depends on what you want,,,,,,,also, my banner is based on 4.00 a pack,,,,,,if you consider the cigarettes I used to smoke have gone to 5.50 a pack in the last 3 years, I've actually saved MORE than the 8 grand it says,,,,,,
of course, then you have to subtract hardware, supplies, etc. But I'm a pretty simple vaper. I have a provari, and an Iclear30. I buy my heads in China for 1.00 each head. I make my own no nic juice,,,,,,,,I think it costs me about 2.00 for 50 ml of juice.
Now, if you're a mod junkie or like, GutWrench, you sub ohm, your mileage may vary.