I've spent about 1400 in the year of vapeing. & I currently got enough juice to get me through summer easily. I'm about even with my smoking costs, but keep in mind this was my first year I had to experiment/go through a lot of tanks I didn't like, juices I didn't like etc. Next year will be a lot cheaper, even if I decide to pick up a new mod or fancy RBA.
With that said, even this year I don't think vapeing is that expensive, & definitely easy to save money on. I buy a lot of fancy juices, I got a couple mods, I got a couple backup twists. Tons & tons of tanks some unopened still, few pyrex ones, boxes and boxes of coil head replacements. A lot of spare batteries etc etc.
& even though this year I only broke EVEN with my old smoking costs.. I still have a few hundred dollars in change saved up, all I ever usto use my change for was cigars so it was easy to save.