I thought this when I bought my own espresso machine but then I realized that although the cost per cup is dramatically lower than what it would be if I paid for it at a coffee shop, I drink WAY more espresso (and coffee in general) than I did before I got it, meaning that any savings are purely theoretical. For example, I drink a double shot of espresso every morning as my morning coffee. On this basis, I saved money because the cost of my machine brings the cost per cup down to almost just the cost of the coffee. But before that, I was drinking coffee made by a $30 drip coffee machine that I had had since I moved out to go to college, which was already to that point. So on that basis, I didn't save any money at all. I still think it's worth it because I fucking love having a cup of espresso every morning but I no longer think of it as a "money saving" thing.