Cigarettes are very expensive and there is no way to really get around it, except esoteric approaches like rolling your own cigs, which doesn't even save that much anyway (especially factoring in time).

Vapes on the other hand can range from expensive to cheap as dirt. When I vaped I was spending probably $10/mo to replace a pack a day habit. I made my own flavorless juice and used a $50 tank/mod system.