Im from the UK and your the US right, if you lived in the UK Id say talk to Nick at KingZing, great guy and very helpful... You can buy a 5 pack of Kanger coils, either 0.5 or 1.2, a coil lasts me about three weeks, sometimes two depending how hard I hit it, I save my rebuilds for my darkhorse, dripper but that's another story ha.. My Subtank is my lazy mod, prime coil, put it in, fill with juice, screw it on my Istick and off I go..Seriously, you can't go wrong with that setup, the worst you can do is burn a coil out, pretty safe these days.. Also check out Tiavapes and indoorsmokers on youtube, couple of really nice people with some good info and reviews..