Assume a pack a day smoker spends $7 per day or ~$50 per week.
A quality e cig starter kit costs less than $75, and two weeks off e juice supplies is less than $25.
$ Two weeks of cigarettes > $ Initial cost of quality e cig starter kit plus supplies for two weeks.
Cigarettes = $50;
e cig juice refill < $20.
Savings during week > $30.