I have a box with about $300 in various carts, tanks, tips, adapters and such (and 2 packs of 808 Phoenix bottom coils on the way), have given away a Provari to a family member, have a Lavatube I use only rarely, 2 Volt 65mm batteries I gave away to another family member, 4 1300mah Volt X2s (my main PVs), a box with 147 bottles of juice between 3ml and 30ml that I didn't like, a box with 22 bottles (between 5 and 120ml) of juices I do like (and I have 12 more sample bottles on their way), and a large tub with about $300 in DIY supplies (and I'll need to order more nic and some extra bottles soon).
I only started vaping in January with a Blu. But the flood seems like it should be slowing down. I only have one more vendor on my list after this next shipment comes to try for juices so my sample frenzy should be coming to a close.
And I've dialed into the hardware I like now so I won't be buying anymore batteries/mods. Once I finish the juice frenzy and restock my DIY supplies I should only be buying refills as needed. Which considering my current stockpile, will probably mean at least 3 or 4 months where I won't have to buy anything (unless one of my favorite vendors creates a new, interesting juice

But that shouldn't be too common as I'm kind of picky about my flavors now that I know more about which ones I like to vape and which ones I don't).
It seems like I've been spending like crazy but I added it all up and I've spent about $1500 (not counting the Provari and other stuff I've given away which was money well spent as the family I gave them to have both also quit cigs). Which still seems like a lot but considering I'd been spending $70 a week on cigs, my calculations based on what I have and use say I should break even before the end of the year.