This is classic and typical of how all vapers start and their views on saving money at 2-3 months in. Noting that Vapers have addictive personality traits is an understatement. By 6 months you will have a better grasp of what you need as opposed to what you want.
I have always found the banners noting "money saved" as a complete farse. In no way does that reflect the other costs like gasoline to go buy the ciggies, lighters, or possible health associated costs.
In the last 6 months the e-cig industry has had huge advancements in hardware. Mods are no longer junky bulky glued together items that leak and break easily. Batteries have also made giant leaps in mAh along with much better circuitry and lifetime warranties. Cartomizers didn't change much for years, but are now undergoing a revolution, a lot of bad ones have come out...but that is just part of the process.
Take a look at the Variable Voltage mods that have hit the market in late 2010 and 2011. First you had The Buzz, followed by the ProVari, then the Darwin...all of these are around $250 - $300.00 range and now you can find VV mods for under $50.00.
I think everyone should have at least 1 mod in their arsenal.