Hello Patrick-Star, I think I will be able to answer your questions.
I'm glad to hear your father is interested in vaping! If he makes the switch, it would provide great benefits to his health.
Vaping definitely has the potential to be less expensive than smoking analog cigarettes.
The important thing is to do the financial math beforehand to make sure of that.
I will provide you an example of the start-up costs and maintenance costs of vaping. All the currency is in terms of US dollars, as that is what I am most familiar with.
1 starter kit = $60.00
10 empty cartridges = $10.00
30ml of e-juice (to refill your cartridges) = $20
Total startup costs for one month: $100.00
Cost for the next three months:
$108 for 180ml of e-liquid.
$10 for one atomizer.
Total: $118 for three months, or $40 per month.
Compared to $4/day for analog cigarettes; $120/month or $360 for 3 months.
The average e-cigarette user uses 1-3ml of e-liquid a day, or 30ml to 90ml a month.
So, assuming a cost of $18/30ml, e-liquid would cost from $18 to $54 a month.
A Joye 510 atomizer is usually guaranteed to work for a total of 60ml of e-liquid passed through it. Proper cleaning, however, would enable an atomizer to last a lot longer.
Batteries must be replaced approximately every six months to one year.
If you stick to buying the minimum amount of things required in order to vape, the savings over analog cigarettes can be tremendous.
I hope this helped!
P.S. I wrote a small guide which may be of interest to you as well:
http://www.e-cigarette-forum.com/forum/new-members-forum/153195-quick-dirty-e-cigarette-newbie-guide.html
-Smarto