Second the Pico, nice and compact, goes to 75w which should carry you a long way. It's like $30 + battery purchase. Then of course you'll need a tank. If you're a smoker, how do you smoke? Personally I guess I was "doing it wrong" as I always just strait inhaled, but most will suck it into their mouth then inhale what is in their mouth. If that's how you did it we call that Mouth to Lung (MTL), and a good tank would be something like the Nautilus or GS Tank. If you strait inhale it's known as Direct to Lung (DL) and there's a plethora of good tanks for that.
Anyways,
Pico at $30, then I'd pick up something like a
Samsung 25r or
LG HD2C battery (about $5 each). Then might want to grab 2 batteries and an external charger so you can just swap when the battery runs out instead of having to charge it up through USB. Then for the tank
Nautilus($20) would be a great starter if you like MTL. Might want to grab some extra coils while you're at it though, they tend to last about a week (you get 2 with the initial tank purchase).
All in all without an extra battery or extra coils and no external charger you'd be looking at 30+5+20= $55 plus probably around $10 shipping ordering from those 2 sites I linked (BTW you may be able to find cheaper suppliers, those are just websites I regularly use, usually good prices and US so shipping it's there in a few days, unlike china which takes 2-3 weeks at least). Add on an additional battery an a decent charger($20), additional battery($5), and extra coils($15) and that's about $40 additional, so ~$105 and you'd be set for a while minus juice. So $65-105 to get set up with this.