except if the kit has nicotine in it you might get addicted and spend more money
"Kits" don't have nicotine because you aren't buying juice. When you buy juice, it is CLEARLY labelled to have nicotine or not. There is no conspiracy that tricks people into getting nicotine.
On top of this, if he does get nicotine, it would be a 3mg concentrate at most, because more than that will burn like a motherforgeter to someone who hasn't inhaled nic before. Getting addicted off of such a low concentrate is really hard pressed.