Just a couple of quick questions, as I have a laundry to landscape system with a surge water barrel. It works very well for my use, and have been following this but am confused about the quantity of water you are producing.
How much water and from what sources?
Is there a reason you are looking to (Not trying to be a jerk, but just interested.) make this a big project, vs. something smaller scale and easier to maintain?
Why do you want to filter out the skin flakes, etc? They will break down and part of the beauty of using greywater, is not needing to filter and clean it.
Have you looked through any of the greywater book for plans and schematics?