How do I vape? Well, I started to cut back/possibly eliminate cigarettes. Tried gas station disposables, then moved on to ego spinner/twist type batteries/clearo combination. Never needed/desired cigarettes since. I've got it in my head that I'd like to reduce my dependence on nicotine (just like cutting back on my coffee/soda intake--less is better for my personal health needs). Will I ever put down the vape? Probably not. I find it a really fun hobby and a healthier alternative for my nic fix. And I've been bit by the "Shiny"-itis--no going back now, lol!
As far as money spent, as long as all other wants, needs, and desires of the household are meant (i.e. bills are paid, kids are fed and happy, retirement account is funded), what one spends on vaping ($0 to $$$$$$) doesn't matter to me. Vape a lot, vape a little, vape till you "quit" or keep on going because you like/need/want it. Whatever floats yer boat, whether it's one basic device or 100s of high end gadgetry.