Running small businesses and operating large aquaculture tank systems are beyond the scope of this manual, but there are some references listed in the Resources Chapter that you could consult if you want to grow fish and vegetables for profit. The first thing you should do is read this manual through. This will help you get an overview of what is involved, what you will have to do, and what you can expect. Then go and get information or experience from other sources. They should be a good source of information.
Public libraries are also excellent places to find out more.
While you are learning about aquaculture from books and people, keep your eyes open for sources of cheap or free materials. You can save some money by spending time stockpiling things like barrels, pipe, and rocks. These will help you focus on what aquaculture is about and how you really feel about it. It might be a good idea to buy a tilapla from a store and eat it, just to make sure that you like the taste. Remember that fresh fish that you raise yourself will taste better than frozen or dead ones from the store.