Do you live in the US? If so:
You can get those grids at Walmart (if your store doesn’t carry them, you can buy online and ship free to store) or at Sears! I have used them for years and I just attach with zip ties. I have also picked some up at thrift stores.
Some other cheap housing options:
– Use a dog crate (probably would want an x-pen to make it bigger.
ex: https://s-media-cache-ak0.pin…5d7269.jpg
– Repurpose some old furniture (I love this idea. You would have to be careful to make it large enough, unless your bunny is a house bunny looking for a hangout). You can use cribs, bunkbeds, dressers, or cupboards.
– Cupboard: https://www.pinterest.com/pin/65935582020917917/
This is cheaper than you may think. You can often get thrift furniture or free throw-outs and just remove inside door panel and add chicken wire
– Crib: https://www.pinterest.com/pin/163325923962911440/ Cover the top with cheap lumber or pallet boards
– Bunk bed: this is from a BB post: https://binkybunny.com/FORUM/tab…fault.aspx
– https://binkybunny.com/wp-content/uploads/converted_files/Portals/0…A4kki6.jpg
Good luck!!