If I had the space, I think one of those fish/tomato hydroponic systems would be neat. I think somewhere in asia this was invented due to lack of dry, flat land?
This is what I have in mind, long term... It's refered to as
aquaponics. The primary reason I'm committing to hydroponics is for the opposite of what you refer to. I have to truck in all my water, 2200gal at a time, it's expensive and time-consuming. So, I have to use my water wisely.