Aquaponics system. Need people to critique my system

[helomech]

I am about to break ground on my aquaponics system. I plan on digging into the ground about 6 feet into a hill side in my front yard (but will build up at least 2 feet of gravel) so about 4 feet below ground. Going to build cinder block retaining walls, and have a gravel floor for drainage. Fish tank is going to be inside of the structure. The top is going to be made out of hog panels, to support any vines, and to be a support for the cover (mesh in summer, and platic in winter). Going to use a wind turbine, and solar panels for power to the pumps, and some lighting (probably LED). The structure will be either 10 or 14 feet wide and 30 feet long, and will have a north south orientation. Any ideas or suggestions are greatly appreciated. Here are some quick images of what I am planning. will be making my own grow beds out of wood with a platic liner. The system will be the drain and fill type with the pumps running all the time, using bell siphons to empty.

Please excuse my sorry images.

This is a image looking from the side.



One from above.