Let’s focus on kitchen during the winter . You could be sure that the natural cold is lasting for around 6 mounths this year, so why not thinking about kitchen for the whole six mounths , aiming not to need more heat for the whole period .
If you think like that , you could fix directly , for example , 5 kilograms of coffee for the whole cold period , and set , then , your choice , for the whole year .
if so , you are not going every week , looking for coffee , if cofgee heats your body , you would more directly look for large sizes of coffee , which is usually cheaper .