As an alternative, I have the Marshall Folding Ferret Mansion. It's less expensive, really big, and collapsible for easy moving. It was really easy to put together. The wire grid shelves and ramps made me nervous, but I wanted to wait a bit before dropping a bundle on tons of wood shelves, so I covered all of the wire shelves and ramps with fleece and velcro & added a few cheap marble tiles from home depot, so she'd have plenty of warm and cool places to sit. I've added a few wood and lava ledges and perches to add interest, but I haven't needed to get rid of the wire grid shelves and ramps. As long as they are covered with fleece, my muppet can't get hurt and she seems to love all the space to play. Also fits a huge 16" diameter wheel for running. If you're interested, I'd be happy to take some pics of what I've done with her cage to make it safe and lots of fun!! Just let me know