Happy Monday, @tarrington.
Shared folders take up the same amount of space, in each member's account.
One way, is to create and share a folder that has only the files they need to edit, and add / remove files as necessary, to keep the folder with as few files as possible.
If that still puts the user over quota, you can try sending them the folder via a shared link.
Then they can download and edit the files, and send them back via a file request.
I hope that helps!