Great idea, Deborah!
I'd like to share a site that can help connect crafters to free materials. It's called trashnothing.com and has groups by location. The group for my area gets regular traffic, with folks offering all sorts of items for free. You can also post requests for items.
Another good resource is SCRAP USA. They don't have as many local chapters, but you could help start one in your area. Instead of individuals, SCRAP collects materials from bigger sources, like schools and local businesses. They then sort it and place it for sale (on the cheap) in their shop. The one in my area, SCRAP Humboldt, has been great at connecting our local artists with the "trash" they need to create their treasures.
We can also share our skills with each other. I have another team, Sharing.
https://www.etsy.com/teams/27211/sharingThe purpose of the Sharing team is to provide a place where Etsy shops can support each other, whether it's helping someone with hiring their first employee or creating a banner ad in exchange for items or skills. Few of us can do everything, but all of us can do anything. I'm hoping the Sharing team can help us help each other in a mutually beneficial way.