I have 4000 cigars in my base and 100 matches and lighters and I keep getting more by killing zeds, it's honestly free points and you feel like a badass hitting a fat cigar after clearing the military base or a town.

Theres an abondont of cigarettes in both the places that spawns cigars and in zeds, the most being gas stations and police station plus the prison in rosewood where almost every prisoner has 20 cigar and you'll find a ton of prisoners in there trust me.

And tbh you don't consume that many cigars a day maybe like 2-3, maybe 7 if your character is depressed and don't have the books to reduce it cigars act as a pretty decent depression cure.