When you are selecting a site for a freshwater enterprise initially there are two main considerations. Flat ground is a high priority, largely due to earthmoving costs if dams are being constructed. If this is the case then heavy clay soils are necessary. Also, understanding what the land was used for prior to the venture is important. What fertilisers / chemicals were used previously?
There are other considerations. What infrastructure does the site already offer? Are there sheds and other useful buildings? Is there a bore and what is the quality of the water? Are there any sites available that already have dams, ponds or tanks that can be converted easily for use?
The climate is important. How balanced is the weather system? How much artificial input would be required to support the production system? Does the climate match both animals and suitable plants? How does water runoff occur and what is the potential for harmful chemicals to pollute this water? What lies upstream and what possibility is there that excess agricultural chemicals and nutrients will cause an issue?
Location also impacts access to consumables, materials and manufacturing. Is the site close to concrete / fibreglass manufacturers or to feed suppliers as excessive transport could incur extra costs. Likewise, you have to consider the transport costs for exporting the produce. It's also necessary to think of what access you will have to laboratories or experts in the field and what other agricultural enterprises are in the area that your business could link with to value add to your product.
Finally consider what government policies are in place. Are there state bans on certain species? Are there grants/support in that state.