4+ week old chicks have outgrown brooder but coop isn't ready!

[barn206]

Hello! So I'm running into a bit of a situation.. My chicks are about 4 1/2 weeks old! I started them in a small brooder and moved them to a larger one at 2ish weeks old but they are quickly outgrowing the one they are in now! I've read it's typically about 8 weeks of age that they are ready for the coop. Our coop isn't quite finished yet anyway. We need 2 more weekends to finish it up! Can anyone provide advice/pics for inexpensive options to house chicks from about 4 to 8 weeks? Thank you!!

I know what that feels like
I had to mine in the garage til I finished my coop. The dust in the house was insane not to mention they wanted to fly out of the brooder. I put cardboard on the floor, their heat light and screened in a 4x6 area for them