even being very cheap, ecigs ended up costing me more in the beginning. after about 1.5 months i was at break even, now im ahead and that's not even counting the fact that im now paying for my gf to vape. considering the health benefits and the fact that im not nearly as addicted to vaping as i was smoking, i think its a net positive. i would say spend a lil more in the beginning then after that spend equal to or less than what you would spend on cigs and worst case you'll break even.