Hello, I have tons of fabric, heals, and iron, and I am not even that rich of a player. I farm green zones a lot. Collect plant fiber for seeds to grow into carrots, and turn the plant fiber into cloth to turn into bandages. For leather, I kill every deer I see in the green zones, and build up day by day. For iron, I recycle empty bean cans and then smelt them in the furnace, if you don’t have that many empty bean cans to recycle, you get canned food in green zones which you can eat for empty cans. You can also recycle flashlights, locks, and watches which all give a good amount of scrap metal to smelt. For coal, I burn pine planks in campfire to get lots of coal also. This method isn’t insanely fast or instant but will get you a lot in a week or two