.. speaking of coffee and tea you can get an inexpensive €.5-2 cup of expresso/cappuchino in europe, turkish/greek coffee I greece and free tea at any purchase at any gas station in turkey, or any food purchase in muslim countries. There's no reason to carry something half world you won't need until you get to australia.. can be purchased there. As for time 7 days, 7 weeks, 7 month it's all the same if you don't use something for weeks you don't need it, IMO. And weight is relevant for the state of your bike and when you need to pick it up. There were times in central asia when I started day by looking for welder, 4 days in a row sometimes.

@OP look into guesthouses iOverlander has some info and some listed in booking.com and in google; they're common in eastern europe and asia.. other parts of the world too. Talk to locals when you are going through village and see people selling food (tomatoes, potatoes, etc) they can be talked into cooking it for you. When my frame cracked and local "master" and I worked on the bike for a couple days I stayed in his house and he fed me.. all together was pretty cheap. And places selling food in remote villages where there's no guesthouses can let you stay overnight when customers gone; at least you would have roof over your head. You might end up listening to donkeys all night but that's another story. Make sure your Google translate works well; if you don't have service prepare some key phrases in advance good luck.