Hi,
I've been using DBS since i started last year. It works pretty good for me. The beddings can last for many years. Since they get compacted and muddy, you only add more every other week, less that a foot usually. After one cycle only a foot gets truly wet and you can use that as fertilizer. I shall try to post pictures on how to make one, later after i got off from work.
Veni
www.balogo.wordpress.com
here's how to - http://balogo.wordpress.com/2011/04/15/how-to-make-deep-bedding-system-dbs/