Guess I'm on the low end of the stick here as we are using about 30 lbs. per month in our mobile espresso van. BUT we have only been in business about 3 months, so I guess that's not too bad. Personally I'm drinking several pounds of that in doubles both in the van and at home.
However I think it's an OK number for the time we're out. Up until 1 week ago we have only been out 4-5 hrs. daily because of propane cost to run the generator. Now we have a nice 220V connection to plug into and can stay 8-10 hrs. daily with much cheaper operating cost.
In our area drip and hot chocolate have been the big sellers, but have noticed a trend lately... most people are buying espresso based drinks and not so much of the other stuff now. Our county is rather hick-like and most say "what is that thar expresso like, some kind of special coffee or sumthin"... so I guess we must be doing something right. Lots of great publicity and no negative comments so far except for the here and there "why is your hot chocolate that high?" Or "why is a cup of coffee $1.75"... Well because we have a van to pay for, we pay a sublease to park here, we pay for propane and now electricity, we have insurance to pay for, we have very fresh beans, we keep this machine on all day, we use Monin chocolate sauce, we use fresh milk that is steamed properly..... Then I tell them if they don't like the taste it's free.... have been paid for every drink so far... Later!