Hi Costeve,
Welcome! Good to see another Coloradoan in here.
Your cig cost is comparable to what I used to pay ($35/carton), so I can reassure you that vaping is definitely cheaper than smoking.
I use around 1.5-2 cartomizers/day, but I used a little more than that when I first started vaping. I started with the 901 model, but I got really frustrated with all the dripping, filling, dropping, and just general fussing around that it required.
Then I discovered the 2-piece (battery and cartomizer). Cartomizers are the way to go -- just screw it onto the battery and vape. To stretch the budget, you can refill them (several members here have refilled them 10-20 times). But I like the ease of use and the convenience of just screwing on a new one.
Cost: This will vary depending on your upfront costs. If you want to take a barebones approach, just get a couple of batteries and a charger (one battery to use and one on the charger). You can always add more batteries/accessories later after you determine that you really like this. But I highly recommend getting one of the kits, since they all include a free box of cartomizers to try (and you can select the flavor and strength).
For the cartomizers, a box of 5 here at V4L is $12.50, but you always get a 10% discount (coupon code SMILIN), so the actual cost per new cartomizer is $2.25 each. As a previous 2-pack/day smoker, I usually use 1.5-2 cartomizers per day (that's $4.50 vs. the $7.00 I paid for cigarettes). Shipping is by Priority Mail ($6.95 for most of us), so it's more cost-effective to place larger orders rather than smaller ones to help on the shipping costs if that's an issue for you. I'd also like to add that even though other suppliers sell the cartos a little cheaper, the ones from V4L seem to last a lot longer IMO.
The customer service here is outstanding, and Steve always throws some free "extras" into each order. Feel free to read through this subforum, and you'll see what I'm talking about.
Again, welcome to the forum and welcome to this subforum!