Welcome Lizardvine,
Since Buck Jones isn't available to answer, I'll post his reply to another person on the question of cages.
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Go on line and query subjects, such as, "pet cages, animal cages,rabbit cages, rabbit supplies, rabbit accessories" and the like, inorder to get some idea of what is out there. Rabbit supplyhouses will sell you materials/tools to build your own. TheAmerican Rabbit Breeders Association site has plans for rabbit housing,as do other such sites.
I make extremely functional and user friendly rabbit cages from dogcrates we purchase at yard sales and flea markets for nominalsums. I make a wooden frame of 1" x 3" pine, with1/2 x 1/2" vinyl clad hardware cloth(wire) attached, that I suspendinside the dog crate with hardware hooks above the slide in/out tray.
The beauty of this conversion is that the door is easily opened, yetcan be securely closed; the top swings openforeasier cleaning and maintenance; the dog crate is tall enoughto permit bunny to stand up; crates tend to be roomy and substantiallyconstructed; crates can be easily disassembled forstorage purposes; and, purchased at yard sales and fleamarkets, tend to be incredibly inexpensive. For me, such aset-up, including crate, cost of lumber and hardware clothusuallyis no more than $20.00 maximum.
Buck Jones