My switch date was in February of 2011. I had cut my smoking costs a long time before that. For a dozen years or so, I smoked 'stuff your own' cigarettes. A raise in taxes had again driven cigarette prices up. However, 'pipe tobacco' was exempted in our state. Some of the pipe tobacco, which sold pretty inexpensively was closer to cigarette tobacco in flavor, but had a bit of pipiness to it. And gosh, it was stong and somewhat harsh.
'Stuff your own,' (my expression) is done via loose tobacco sold in bags along with emtpy filtered cigarette tubes sold by the carton. A hand ratchet machine stuffed the tobacco into the hollow tubes...one at a time. This process is about the same as the cigarette manufacturer's use, but rather low on the automation scale. It was very easy to watch an hour long drama on TV while making up a batch. Casually, I could make about one a minute, or if I hustled, about 30 seconds each.
I smoked about 2 1/4 packs a day (would have been ~3 of Marlboros). I did this for quite a while at a cost of $16.60 (cost at time of ending smoking) a week. Switching to vaping actually cost me quite a bit over smoking...for a while. Chasing the Dragon of vaping kept me testing new flavors and hardware over the 1st many years. I don't recall excatly when I broke even, but it may be in my financial records. Of course that all involved the transistion from cigalikes and cartomizers to more modern atomizers and power devices.
All in all, I was spending $16.60 / week average on smoking. When I switched, I didn't look back except for I had about 1 1/2 cartons worth of stuffing supplies laying around. A few years after switching, I decided I didn't want them around. I remoisturized the tobacco, stuffed it all up and smoked them (outdoors) at a rate of 5 or 6 a day over a month or so. Afterwards I didn't have the desire to smoke, though before I had wondered if I were tempting fate.
Recently Blu's were offered for $1 each with free shipping. I bought 10 to test and give away. I realized after I ordered, the the $10 I spent was the 1st I had spent this year on vaping...past half way through the year. I'm still working on a 10' piece of Rayon that I got several years ago for a dollar or two. I guess I'll have to get a box of Rayon at some point and would be happy to find someone to go in on that with me...I know no local vapers to speak of.
Being stocked up and going flavorless has cut my vaping expenses to near nil. DIY flavorless saves on flavorings and no manufactured ejuice costs. Also, I've come to believe that flavorings drive not only liquidware, but chasing hardware as well. My wicks don't need changing very often. Coils last near indefinitely. My current attomizers are satisfactory. Batteries need occasional replacing. Vaping has become quite routine...about like smoking was. I'll mix a 120ml bottle of flavoless and that lasts the better part of 3 mos.
Unless something significantly different comes along in the way of liquidware (nic base w/WTA?) or hardware (piezo-electric or other vaporizing system?), I doubt much will change for me. I'm no longer in the chase and other than a limited amount of supplies, I can't see I'll need much for my remaining years (near 70 y.o. at present).