Personally I took me ~ 6 months to not want a cig.
And by that I mean, now when I smell cigarette smoke it kinda disgusts me; if someone offers me a cig or says "why don't you just smoke a REAL cigarette" I actually have a response:
Cigs are 'weak' (I usually use a word that starts with a P

); No Flavor, No Throat Hit AND No Clouds. I actually prefer to vape. Then I take a huge drag and ask them If they want a hit as plumes of beautiful vapor comes poring out of my noise and mouth.. Usually carry around an extra drip tip for that reason and have blown peoples minds...
I work right next door to a smoke shop so I get a lot of interaction with smokers.
But I digress, In the first six months I "quite on day one", for about 2 weeks but when I started having issues with my CRAPPY V2 cigs kit I bout a pack and ordered a SI Volt kit. It was better, kinda, but I still smoked ~ 2-3 a day (which was a lot better than 20+). It went on like that for a while and I noticed as I actually learned about e cigs and upgraded my stuff to eliminate issues I was having (short battery life, crappy flavor, poor juice capacity, and my biggest pet peeve, unreliability) my smoking really dropped off.
I took a look at how much money I had spent on cheap crap from China and I started to really bug the hell out of me; yeah I was smoking less (4-5 cigs a week) but I kind of felt like a chump because I knew I was getting raked over the coals for these clearo-mizers this and replacement coils that, they all ultimately did not preform as advertised or burnt out in a matter a days. (I vape 7-10 mils per day)
So I figured if a China man can coil a wick so can I, and that is really when I started to love to vape. As soon as I got familiar with RBA's all the stress of hoping my head/coil/atty would last until my next order vanished. I no longer felt taken advantage of because I could see that my money was going into something that would last rather than a disposable product.
Don't get me wrong, e cigs do have huge learning curve; and to think that I should have just got genesis style as my first PV is insane. I needed to take baby steps and build up my understanding of whats out there and what works for me.
When I was a noob the way I controlled overspending is I took how much I had spent on a given set up, divided that by how much I was spending on cigs/per day and took that number and doubled it. I used the set up for that many days before I upgraded.
Cost of set up ($)/ cost of smoking ($ per day) = X days; then multiply by 2 (to account for juice and maybe save a tiny bit of cash vs smoking).
That equation went out the window a long time ago for me

but it did help me to not overspend when I was new to e-cigs.
I know I haven't even touched on juice; that in and of it self is a huge topic. Taste is subjective, go to a brick and mortar and sample, sample, sample; and ask "what are YOUR all day vapes". And don't be afraid to step down your nic. I started at 24mg and now I can see it was prob too high. I vape 12mg now and 6 at night.
Right now I'm vaping Khlorine by Vapetrik (RiP Tripper), ehh it's pretty damn good. But my all time favorite to date is hands down Cran Ch'i by Halcyon. The reason I talked so much about devices or PV's is Cran Ch'i is a light flavor and taste like garbage with silica wick heads. In fact, personally, I wasn't really happy with any juice until I got into a genesis. I'm vaping FC-2000 ceramic wicks and stainless in some of my back ups.
Trust and believe, vaping is a crazy crazy ride; and it has its ups and downs. It is far more involved than rolling leaves in paper lighting it fire and breathing it in.
Man was not meant to breath fire nor vapor.
But it's up to you to decide which is the lesser of two evils...