Same here. Using 2.4 ohm BCC tanks, I was going through about 4-5 mls of e-juice a day. On a sub-ohm tank (which I only vape at home) I can easily plow through 5-10 mls on the sub-ohm tank in an afternoon/evening. 10-15 mls if the weather is crap! (with wind chill, 6 below) and I'm home all day.
I'm gonna keep cloud-chuckin' at home. I tend to put my pricier e-liquids in my sub-ohm tanks, and if I started vaping those all the time, I'd go broke.
But it's a damn satsifying, tasty vape!
Most days, I can't wait to get off work, head home and fire up the iSub!