You want lots of free textures for Blender? I mean a lot? How about 4.7 gigabytes worth!? Here’s a link to a Blender Nation article which references a download link to a massive zip file! The author claims they’re all CC0, but also says that they started by taking them from someone else, so take the license with a grain of salt and use carefully. Still, could be a great opportunity to save a lot of time if these are any good.