I would worry less about 'scaling it up' and possibly setting up more facilities, albeit smaller, throughout the area. This will provide many more wide-spread job opportunities, the money will stay more local, as will the food. Additionally given your stable climate, smaller scale facilities may not lose efficiency as easily (as in economies of scale).
One thing you do have to keep in mind though is that the crops you choose to grow generally must be leafy and green. These crops have the highest nitrogen requirements and benefit the best from the nitrogen cycle in your fish tanks. Thats not to say that you cant grow other crops, you just need to ensure the nutrients produced are able to be absorbed by the plants you choose to grow, while ensuring that no nutrients are missing from your chosen crops nutrient requirements.
Tilapia are a popular choice of fish, but systems have been known to use trout which grow a bit faster. Popular crops are generally lettuce and spinach (kale, cabbage, etc as close seconds).
I hope I gave you some food for thought, and would love to be kept updated as to your progress!

edit on 10-11-2011 by IntegratedInstigator
because: minor grammatical fixes




