eBay has a Black 48" 2 Door Pet Cage Folding Dog w/Divider Cat Crate Cage Kennel w/Tray LC on sale for $39.99, free shipping.
http://www.ebay.com/itm/Black-48-…1001017225
It has 2 doors, plastic bottom tray, and an included divider (to make the kennel smaller inside for potty training).
We’ve typically paid $50+ for these in the past. Wish I needed one right now…
They also have other sizes on sale if you look at similar products on the page.