Honestly, keep a ledger. Smokes cost $4.12 for the cheapest here. Almost the lowest price in the States. How long have you been vaping? PAD? Do the math if so/if not. How does vaping cost up?
I've got tons (as in, I have redeemable points over there that I can't find a current use for) of FT crap I'll never use, a gallon of VG, a liter of nicotine from NN, dozens of flavors from TFA and ECX, etc, and I'm still in the black compared to smoking for the past six months (approximately since I stopped using Snus to help keep cigs away). That's including four Reos, two Woodvils, two Nuppins, an RM6, and a Derringer.
Make a vape budget. Throw a woodvil (at least one) into it. Throw a few hundred for atties and batteries into it. DIY for pennies per dollar or include near bulk of favorite juices. Show the wifey the numbers. I'll bet you'll be in the black within months, no more than a year, compared to analogs. Tell her about the ridiculously expensive purse (undergarments, satchel, phone?) you'll buy her in a year with the savings. Watch her nod in approval when she sees the reward. And, as long as you keep your promise(s), your vape budget will be secured in perpetuity.