The problem with coffee/caffenol as a developer is that you still need fixer, and while apparently salt works, it sounds hit and miss. So it's kind of hard to a

The problem with coffee/caffenol as a developer is that you still need fixer, and while apparently salt works, it sounds hit and miss. So it's kind of hard to argue it as a sort of eco/cheap solution when you still need other chemicals. It's a curiosity/art developer more than anything else. Especially when you can buy very cheap concentrate like Rodinal (1:50+). Stop bath is less of an issue. Rodinal is about £20 a litre which will dilute to work for at least 25-50 films (probably more if you're doing single roll tanks).