What intoxicants are cheaper than alcohol? The only one that comes to mind is cannabis, and if people are ditching alcohol for cannabis I think that will surely save lives.
Alcoholism is unusual among addictions in that it's (1) largely invisible until its end state and (2) minimally taboo when it occurs in "high-functioning" individuals. Huffing chemicals is neither of those things, nor is swallowing mouthwash (which is more likely to make you sick than drunk at the quantities an average adult would need.)