Perhaps check out the Chicken Chick's article on a broody hens? Although it sounds like you can't do a wire crate right now, this article talks a bit about the concepts behind it
. https://the-chicken-chick.com/?s=Broody+breaker

Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Then go out and buy a smaller foldable wire crate
and some 1x2" cage wire for the bottom.
Good tool to have for any chickeneer.