Woot! We have a small teaching greenhouse up in Albuquerque with one of the middle schools (we are hoping to get them in as many schools as possible) with a growing after school program. Their system has two totes as the fish tanks. It has the potential to produce 45 heads of lettuce a week along with other herbs in the media beds. Will be honored to help get your system designed, built and up and running! The big things is plumbing and it looks like you have that well covered.One or two totes could be used for water/fish tanks and other totes could be cut in half, and used to grow plants in growing medium. @HomeOnTheRange is into aquaponics and I am hoping he could help me work on the details to make it work.