Sparky,

"Rubber mats" work well to protect cables on ground. Look in your Wiremold catalog. Cat. no. BK1200-10. They come in ten foot sections. There is a little raceway you can place your cables in. There is a slight "hump" on top. People will be protected if they accidentally walk on it.

This may be cost prohibitive to you...

You may get away with using the 25 KVA transformer. The load for sound systems etc. never seems to be as much as they ask for.

Frank