Most days it’s two 18g of espresso, one 25g made into a pour over. I go through about 2kg a month (about 4.5lbs) with dialling in and some shots for other people.
I spend anywhere from £60 per kilo down to about £30, depending on where and from whom I am buying. My local roasters (Outpost.coffee) tend to be more expensive than some of the other big names in the UK.
Depending on what’s available, I either get a single bag for espresso and a bag for pour over or a bunch of different bags, anything up to 8 typically.