I don't really feel like Vaping is really a cheaper alternative. The initial setup is expensive. Finding your ADV is expensive (some it takes months upon months, took me 8). I probably have three gallons of juice I'll never use. New mods, new RDAs, RTAs all of which claim to be the new most fabulous thing. DIY has an expensive start up, I don't care if you spend .06c per ML, chances are you've wasted tons of money trying to figure a juice mix that is vapeable.
I like vaping because I like the variety in flavors, and the (hopeful) health factor. Not because it's cheaper.