See the handle. Lol
I purchased an evod starter kit and stuck with juice at the .50/ml price point or lower. In the first few months I added a mini pt2 to have a glass tank, otherwise that starter kit served me very well for about 4 months and I still use it when out and about.
All gear is genuine kanger:
Evod kit: $34
Mini pt2: $12
Extra charger: $4
Evod/pt2 coils: Estimated $12/month (2 boxes of five coils, more than I actually used)
Juice purchases: Estimated $40/month (some more, some less)
First 4 months of vaping: Approx. $250 in total costs. (Would have been slightly higher, I was given several "premium" juice samples from a well-meaning soul, but many I could not vape so it's hard to say exactly how much those little bottles affected my costs)
4 months of cigs would have run me about $1000.
I just set a budget and stuck to it. I upgraded to larger capacity vv egos and a couple of full size pt2's at about 4 months in, when I had a little more money and knew for sure I'd be vaping long term. My next upgrade was recent, adding an MVP at about the 8-month mark. I'm satisfied and done buying hardware until what I have wears out.
If you have money to spend and it brings you pleasure to experiment, go for it! Nothing wrong with that. And you don't need anyone's permission or approval but your own (or maybe the other half, if applicable).
But if that's not your situation (or regardless of finances you just don't feel the need) it's entirely possible to vape on a budget, find vaping enjoyable, ditch the cigs and save tons of money even in the early stages.