I started off rebuilding mini protanks 'cause cents in wire and wick means frugal, and fun. It wasn't fun long.
I went to a rebuildable drip after a few weeks, then to a kayfun mini 2.1 clone. Months later, this is solid, no matter your battery- from 14500 mech mod to ego to 18xxx vv mod. Spend the extra money (my clone cost $50) and get a real atomizer. I refuse to fight for my addiction. It has to be easy to keep me from tobacco.
I run cotton, change the wick every 2 days or so, my coil I remake every 3 weeks or so (when it gets so brittle it snaps on rewicking).
I grab a small screwdriver, make 8 twists with my 30 awg kanthal = 1.6 ohms. This takes 10 min from start to finish (only 5 to change/make my wick).
Edit: On the rare chance my tank gurgles (right after refilling), I turn it upside down, push the button, and blow through the air hole. When a good cloud comes out, I won't gurgle again until I refill (as long as the wick ends are on the juice holes). I have a friend with a real Kayfun lite. Mine is much better (I guess the mini is a better design, the lite doesn't clear when you blow, juice bubbles out the air adjust hole- even w/screw in).
Buy a top quality atomizer. Kanger is crap.
Edit 2: Not to mention the Kayfun mini 2.1 has a port one can use to refill (with out opening the tank) if the proper needle tip bottle is used. Just push it in, and squeeze. Tank is filled. The atomizer is the same diameter as a typical ego battery.