Well, spent today doing what all home owners do on the weekend. Going to Costco and buying lots of stuff. Allow me to acquaint you with my new found philosophy for buying things at Costco, of which I was not aware until recently. If you haven't purchased the item OUTSIDE of Costco, and used it to completion, then don't buy it at Costco. Really, the idea is pretty simple. For example, I have purchased many roles of toilet paper in my life, and I do end up using the entire package. Ergo, this may be a Costco purchase. I have also purchased a number of viles of vanilla in my life, but I have never once used the entire vile to completion. THIS IS NOT A PURCHASE TO BE MADE AT COSTCO.
The big problem with Costco isn't that you actually save money there by buying lots of goods, the problem is that you only save money there if you actually USE the goods. $20 for 15 lbs of nutmeg is a great deal, but if you've never even used a tbsp of nutmeg in your entire life, that's basically a waste of money.
I have many other theories about buying in bulk, let's sum this one up by saying, Costco is not a supermarket. It’s a wholesale goods seller. Never tried something before? Supermarket. Need something for one recipe? Supermarket. Worried you’ll run out of something within the next three months? Large purchase at supermarket. I use this every day/week/month and I’ll use it every day/week/month for the rest of my life? Costco.
Except for books and clothes. Those you can get there any time you want.