I work in a café, so I really only pay for my coffee on my days off.
I average maybe half a pound of beans per month for home brewing, so let’s say $20 for a nice bag from a local roaster (in Canada-bucks). Ten or so dollars in V60 filters is enough to last me most of a year, so add a dollar a month. I also like checking out cafés, so add $15/$20 in random café visits, and I’d typically spend anywhere from $20 to $40ish per month.