You can build a commercial aquaponics system as a business. It allows you to produce a lot of fresh vegetables in a small space close to your markets, best near a larger town or city.
Here’s a nice video of a 500m2 greenhouse – solid built – year round production – https://www.youtube.com/watch?v=HnMTptwzvHA
We can plant fruit trees and melons in Aquaponics – https://www.youtube.com/watch?v=bJ-i5sEUq_I
Here’s a very nice South African video building a semi commercial system for cheap – using mostly waste wood and PVC.
Heres a video showing a massive large aquaponics system https://www.youtube.com/watch?v=rAeG47qxL6c