you can buy cheap vapes on ebay. $15 or so. add that with a $10 sampler from a store and you're set. Thats how I got started and never looked back.
example of a cheap little kit w/ battery and charger:
It is absolutely necessary, I can go on about operator reaction times and braking abilities at speeds over limit...but you would probably not care.
What I will say is: "How else would counties and cities make their money to fund road repairs and pay their patrols?"