I think the thing about spending too much money on this hobby is that when switching over from buying cigarettes, our mind latches on to whatever addictive feelings it can. For me, I care nothing about buying multiple products because while I want a good vape, I was always a "buy a pack of cigarettes and smoke" guy. I never bothered over dissecting different cigars or pipe tobaccos; the personalities that liked that stuff will probably be the hot-rodders of vaping.
My advice is that when it comes down to it, if what your vaping is seriously lacking to the point it makes you want to go back to cigarettes, that's when you know you need better. However, when you're at a point your vape is much better than cigarettes, you should probably settle with your set-up until serious defects develop with your devices that require replacements; this will allow you to feel that you got your money's worth and will allow more time for better products to come out or extreme holiday sales to come around.
Also, do your research. Common knowledge is that plastic tanks melt and crack with most juices, and that plastic bottles melt too. Make sure your tank system is glass and make sure your company deals with glass bottles. Also, as small as Twist batteries now get, there's hardly a reason not to update to these or better right off the bat. On top of that, spend time with your device, try things, and so on. Oftentimes, little changes could make a big deal; you probably don't always have to rebuild everything.
Researching safety and overall easiest performance cuts about %95 of devices and juices from my list. Style cuts out the rest of the %4. In the end, I went with a Protank II, a clone Twist battery, and a juice from a truly trusted vendor, MOV, a company that is really revolutionary as far as safety standards go. I'll see how the whole thing goes!
