Sounds to me like someone is a little testy, and wants to preach. I did not set myself up for failure so I could smoke. Great for you that you had the cash to order a ton of stuff up front, not everyone in the same position. I had a budget I had to stay under, doesn't mean I did this on purpose so i could smoke.
Hear ya on the budget! I started vaping to save money when I was laid off. Thankfully I ended up choosing a starter kit that was a set of two, since I couldn't add to it for a couple months. I can't imagine trying to tough it out with only one battery.
101 Vapes, Discount Vapers and Vaping Me are all sites I've dealt with that have low prices and quick service. DV sells their brand eGo/Twist for cheap if you just want a backup and while I've never had one I have a neighbor who uses nothing else and swears by them (take that with whatever grain of salt you like). I do have one of their chargers and IMO it works faster and better than the one by Kanger. YMMV
Vaping Me has only brand name authentic Kanger, Aspire, Innotek and Vision, no clones. "ECF" is the coupon code for 10% off plus you get free shipping on an order over $30. If you like the MVP2 they have an even better deal on the set (with tank) than 101 Vapes (last I checked it was about $35 out the door using the coupon) BUT Matt only takes orders for it on a first come first served basis Tuesdays starting at 3pm CDT due to demand. The week's stock runs out fast so be on your toes if you decide to go that route.
I personally stick with the protank2 and evod lines exclusively due to the long term cost and availability of coils. Anything dual coil will A. Drain your batteries faster, B. Use juice faster, and C. Replacement coils will cost more (unless you want to get into rebuilding). It also costs more long term to have several different types of coils to keep ordering than loading up on one type that works in every tank you own.
If you don't mind any of this and think it's worth it, from my experience trying different things out I actually prefer the Aspire BDC ET-S to the protank 3. I think it gives a better flavor and the metal housing protects the glass to a point, making it a bit more durable. But also heavier, and it doesn't fully disassemble for cleaning. Just my 2c. You'll probably want to try a few different things to find what's best for you.
Sorry for the novel, just some tips from another budget vaper!