You are very lucky that you discovered the rotten hoses that way!
I plumbed mine with steel brake line. I thought it was a great solution untill I tried to drain it. It is really tricky getting a container in there as the steel lines don't budge!
That happened to me! Luckily I wasn't far from home.
I also though about using steel lines and may in the future. Mine does not drain nearly as well from the bottom hole so I just ended up using a drill pump stuck in a bucket with a few lengths of pvc, no problem and empties quick.
Jeff