Have you found a source for the feeders with timers? I've been looking on and off for a couple years since I built my pens and haven't found anything I think would work. I did put automatic waterers in that I made up myself using irrigation timers, and they work like a champ. Here's an old link to when I built my pens...maybe give you some ideas. Don't know what your budget is, but I can quickly add up around $8,000 of materials just in what you have sketched out.
http://www.easttexashogdoggers.com/forum/index.php?topic=7028.0
