Besides wood and coroplast, can you share with me any ideas for an easy to wipe clean cage bottom? Perhaps something like linoleum? 

Linoleum/vinyl flooring is very easy for cleanup! I have used it in both of my rabbit condo's and it has held up great.

I used linoleum but the youngest buns tore it up so I am thinking of staining and laquering the wood instead

My bunnies chewed it too so we now always put wood trim around the edges so they can't chew.

I will have to try that, Thank you

I use a horse stall mat for the floor of my buns pen. It wipes clean easily, it's rubberized so it isn't slippery, being for horse's it provides cushion for my big bun's hocks, it stays cool & it's heavy so it don't move around...

I used MDF board from Home Depot. It's basically word covered with plastic. It's expensive but sturdy. If you use something like this. Make sure the pen/cage is inside the edges so they can't chew it and watch if they chew it during out time. Bunjamin's never bugged his.