I figure it like this: part of the reason vaping is so effective at replacing smokes, at least for me, IS the hobby aspect of it. Cruising around these forums, window shopping the stuff folks are talking about, hunting out the good prices for the stuff that catches my eye...this is all stuff that KEEPS MY MIND OFF SMOKING. It not only feeds the physical sensation of smoking, the nicotine fix, etc., but also provides a mental distraction that I really think makes a difference. At the end of the day, you ARE saving money over smoking, and even if you weren't, I'm sure that family of seven would much rather have YOU around and far more healthy than you would be had you stuck with smokes.
i agree it may not seem that noticeable but you bettering the quality of your life is also bettering the quality of life in the entire household yes economically but even more importantly morally. you being healthier and having more energy and being in a better mood effects everyone in the household in a positive way.