If you are finding yourself craving a cigarette, I suspect you need more nicotine. I was a 3 pack per day smoker who had smoked for 30+ years when I started vaping. I started at 24 mg, and overnight, I was smoking half of what I'd smoked before. Before long, I was down to 10 cigs a day or so - but I couldn't get rid of those. After eating, in particular, I'd crave cigs.
At some point, someone told me to get some 30mg juice, and I did. The day I got that juice, I quit smoking. It was easy after that. And I didn't even use the 30mg juice all the time - I just used it via dripping after meals. I still have some of that 30mg juice, because it didn't take long before I could use the 24 all day, including after meals.
Now, a little over a year later, I've not only gotten off the cigs, I've gradually cut my nic down. For the past few days, I've been vaping 0 nic juice. I've bought several mods, ego-twist batteries, various tanks and cartomizers and atomizers, I still have a bunch of unused juice, batteries, chargers, etc. But I've kept close track of what I've spent on vaping, and it's less than half of what I would have spent on cigs if I had kept smoking 3 packs a day like I did before.
I'm healthier. I'm very close to being free of even a nicotine addiction. I've saved a lot of money. I don't smell like a smoker, and I can vape in a lot of places I wouldn't be allowed to smoke.
You need to keep in mind that the cost you're seeing isn't an ongoing cost. When you first start, you have to buy a bunch of "stuff" that you won't need to buy on a regular basis. Batteries last more than a week or two, and chargers tend to last even longer. The expense tends to be much higher at the beginning than it will be after you've been vaping a few months.