You won't get ripped off from fasttech, they are a reputable company so no worries there.
Most of those built in batteries like that don't last more than a year or two, depending upon your vaping habits, but it's way cheaper than smoking even if you replace the unit once a year, so it's all good. (My first device with a built in battery lasted me right at the one year mark before dying)
Your average e cigarette user vapes anywhere from 3 to 6 ml of e liquid a day - so you will figure in a 30 ml bottle a week to your cost (I know a place where you can get 120ml for 37.00 that is good so the cost is doable even on a budget)
You will be replacing your atomizer coils about once a week but coils are in the general range of 2.00 each so again, it's a doable cost even on a budget.
All in all, with everything considered, you will still spend only a fraction of what you were spending on combustible cigarettes. Your looking at your monthly expenditure being about the cost of 1 carton of cigarettes. (Or cheaper depending upon where you live)
It takes a couple weeks for orders to get to the states coming on the slow boat from China, so have some patience, it will get here.
I was able to quit smoking (I had a two pack a day habit) after a 32 year addiction through vaping. Quitting,even with vaping is a process but if your determined you WILL succeed!
My son wasn't even looking to quit smoking, but since i was so successful at quitting I decided to send him a few things to get him started, when we found what works best for him, he was able to quit and hasn't looked back.. so vaping can be a successful means to quit - even if your weren't looking to quit!
Don't worry, you will get there! If you have questions everyone here will be happy to help. Everyone is so informative and helpful you may end up finding this your new home!
Welcome to ECF.. your off to an awesome start!