That's plenty of floor space and the height is fine. With that kind of depth, you may have some challenges in safely removing fecal matter, etc., however, if you get a 50 inch Gentle Giant tongs from www.tongs.com you'll be able to safely reach in and remove various matter (in conjunction with a shield). Don't underestimate the strike range and speed of these animals.

>>It would be 4' long, 4' wide, and 18" in height.
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Rob Carmichael, Curator
The Wildlife Discovery Center at Elawa Farm
Lake Forest, IL