well I don't know about that but I think my DIY is just as good or better then any thing I can buy but I have been at DIY for a long time and at first it was kind of hit or miss sort of like learning to cook or maybe I'm just biased by the $1.60 it cost me to make a 60ml bottle of juice but my point is in the long run it can be cheaper then smoking.
I completely agree that juice is the most expensive part of vaping. You have the patience and skill to mix flavors that you enjoy, I seriously doubt that I do. Maybe I'm just too lazy.