I've gone with making my own juice for all-day purposes, and I'll tell you what. $20 for 30ml seems way steep by comparison, but going the cheap DIY route allows me to buy $20 juice and treat it like the delicacy it is. If I only vaped the USA stuff, I'd still be saving money compared to smoking, but with our new-this-year daycare bill, I couldn't cut it.
I guess what I'm saying is, v4l makes some

tasty juice, and it's worth it to me to cut corners so I can afford their juice, even if I can't use it all the time.