If you go for Starbucks every day, you can think of that at the $1,000 coffee. If you go once a week, it's down to $142 or so.
So you can put $1,000 in your pocket right away but not doing this. A pound of coffee makes 48 cups, so the most let's say it will last 3 weeks, so that's three weeks for $12, so 50c a day? So that's $185 a year, rounding up a bit. So you're really saving $815.
On the other hand, if you had an extra 800 bucks, wouldn't you just go out for coffee more often?