Collecting scotch is expensive. Entry-level single malt scotch is about $60 a bottle and the price goes up, depending on rarity and quality. I had considered collecting wine as well, but I could not afford to do both. For fun, I did some cost-benefit analysis.
Collecting wine is cheaper than scotch (by the bottle), but wine collectors tend to buy many more bottles. Just on volume this makes sense, considering there are approximately 15 servings of scotch inside one 750ml bottle, while there are about 5 servings of wine in the same-sized container. So the ratio of servings is about 3:1.
Interestingly, if the wine averages about $20 a bottle, the cost per serving is about the same.
3 bottles of wine x $20 = $60, for 15 servings
1 bottle of scotch x $60 = $60, for 15 servings
Therefore the cost is $4 per serving, wine or whiskey. As you collect, you are likely going to invest in pricier stuff as you go along, so the price per serving will probably go up.
If you track your average consumption of scotch or wine for one month, you could roughly figure out how your consumption is adding to the expense of your hobby. Tracking it like that is a bit of a buzz-kill, of course, but probably wise from a financial perspective as well as from a health perspective. The less you consume, the better your collection!