Where do the local farmers get their tractors and tools? Where does the fabric, dye, looms, sewing machines etc. for clothing come from? Where does the furniture maker buy his tools and who makes them? Are your solar panels homemade? What does that electricity power?

Whether directly or not, some portion of the money we spend will end up in the hands of these corporations, even if it just means you paid the furniture guy for a chair and he used that money to buy his kids mcdonalds. And while it's great that you sound like you're actively trying to live in a sustainable way, I don't think you get to deny that if you're a part of the economy you're still supporting corporations, simply due to the sheer depth and breadth of these companies.