Farming as a Hermit

I'm curious what's the least amount of fields I can get away with making as a hermit?
I wouldn't want to make money from them, just have enough to supply myself with crafting materials like cotton and food for increasing my humours.
Basically just wondering what a good number of fields are for that purpose without going overboard and taking up too much space.
I wouldn't want to make money from them, just have enough to supply myself with crafting materials like cotton and food for increasing my humours.
Basically just wondering what a good number of fields are for that purpose without going overboard and taking up too much space.
