By careful online shopping via extensive reading here initially, then experience and trial and error, I spend less than $6 a month, so
less than 20 cents a day..buy your
juice and hardware from the right places and its very inexpensive..and that 20 cents per day began my very first month of
vaping ( after smoking 2 packs a day of analogs for many years) plus startup costs of $30...and the initial start costs were/are minimal as well and less than $30, including spare batteries, tanks, chargers, lanyards, traveling bottles, a carrying case, as well as juice...so my first initial month was $1.20 a day, which INCLUDED ALL startup costs, and ONLY 20 cents a day ever since for batteries, juice, tanks and upkeeps of hardware....the only thing that change over 2 years and my initial start to
vaping was my nicotine intake from 24-18-12-6-3-0mg now, and the $20 savings daily ($10 a pack for analogs) which added $600 a month into my pocket..
suggestion.. buy much/most all hardware directly from China and ALL juice in the USA...great online shopping sites in both countries..