ALso reading up on aquaponics. Looks very intriguing. You use fish in a water reservoir to infuse fertilizing element into the water which the plants purify to recycle the water for the fish. By using tilapia you get edible fish while growing edible vegetables. Fish and salad in one ecosystem.
You are on to something. I did a small scale aquaponics set-up last summer, which worked very well. Bear in mind, unless you rig it for solar or wind, you will be dependent on electricity to run the pump. Aquaponics works well with leafy greens and other small vegetables. It gets a bit more involved if you want to grow peppers and tomatoes, as usually supplementation is required (iron, sulfur, phosphorus).

